OPCE-STR.vp Acta Bot. Croat. 71 (1), 51–86, 2012 CODEN: ABCRA 25 ISSN 0365–0588 eISSN 1847-8476 Southeastern-Alpine endemic Leontodon hispidus subsp. brumatii (Cichoriaceae) in the Sava valley (central Slovenia) IGOR DAKSKOBLER1*, ANDREJ SELI[KAR2, BRANKO VRE[2 1 Institute of Biology, Scientific Research Centre of the Slovenian Academy of Sciences and Arts, Regional unit Tolmin, Brunov drevored 13, SI-5220 Tolmin, Slovenia 2 Institute of Biology, Scientific Research Centre of the Slovenian Academy of Sciences and Arts, Novi trg 2, SI-1000 Ljubljana, Slovenia Abstract – In the spring and summer of 2010 a number of new localities of the southeast- ern-Alpine endemic Leontodon hispidus subsp. brumatii were found on temporarily flooded riparian rocks in the gorge of the Sava River between the village of Sava and Zidani Most (central Slovenia). The species has so far been known only in northeastern Italy and western Slovenia (the So~a valley). In order to obtain more specific information its sites were studied phytosociologically and the communities in which it grows in the Sava and the So~a valleys compared. Two new associations were described on the basis of these comparisons: Triseto argentei-Leontodontetum brumatii ass. nov. and Leontodonti brumatii-Seslerietum calcariae ass. nov. As this endemic taxon and its endemic commu- nities are a characteristic of riparian flora and vegetation of some Slovenian mountain rivers and as its localities in the Sava valley are explicitly disjunct and the southeastern- most in the entire known distribution area, they deserve to be studied and protected. Key words: Leontodon brumatii, phytogeography, synsystematics, Sava, So~a, Slovenia Introduction Leontodon hispidus L. subsp. brumatii (Schiede ex Reichenb) T. Wraber [Leontodon hispidus var. brumatii (Schiede ex Rchb.) Fiori = L. brumatii Schiede ex Rchb.] is a south- eastern-Alpine endemic, known so far only in the foothills of the Julian and Carnic Alps and along some rivers in the Friuli lowland, western Slovenia and northeastern Italy (MAYER 1952, 1958, 1960; WRABER 1998, 2007; POLDINI 1991, 2002, 2009; JOGAN et al. 2001; ^U[IN 2001, 2006; ^U[IN and DAKSKOBLER 2001; DAKSKOBLER 2005). Its localities in Slovenia are on riparian rocks and river boulders in the Nadi`a riverbed in the Breginjski kot, on riparian rocks along the So~a River between Bovec and Solkan (relatively often ACTA BOT. CROAT. 71 (1), 2012 51 * Corresponding author, e-mail: igor.dakskobler@zrc-sazu.si Copyright® 2012 by Acta Botanica Croatica, the Faculty of Science, University of Zagreb. All rights reserved. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:00 Color profile: Disabled Composite 150 lpi at 45 degrees only along the middle So~a between Podselo and Plave), on similar sites along the U~ja River. Reliable sites are only on the Italian side of the former border crossing U~ja (WRABER 1998), very likely also downstream in the Slovenian territory, along the rivers Idrija (rarely, Golo Brdo, under Kostanjevica) and the Idrijca (very rarely, a rocky eyot on Slap ob Idrijci, under the dam at the new, small hydroelectric power plant, 9848/4, leg. et det. I. Dakskobler, 30. 5. 2010, Herbarium LJS, relevé 1 in table 2). During our inventory of the flora in the Sava valley, between the village of Zidani most and Sava, this taxon was found at several spots on riparian rocks on both sides of the river; first on 12 May 2010 on the right bank between Trbovlje and Hrastnik, downstream from the hamlet Ribnik (Dole`ak) – 9856/3 (leg. I. Dakskobler et B. Vre{); on the same day on the same bank of the Sava downstream from Hrastnik, in the village of Podkraj, between the farmsteads Rus and Tohar (9856/4); two days later, on 14 May 2010, on the left bank of the Sava near Hrastnik – 9856/4 (leg. A. Seli{kar). The article presents the localities and sites of this endemic taxon in the Sava valley and the communities in which it grows and compares them with its sites and communities in the So~a valley. The issue of its conserva- tion is discussed in view of the fact that its sites along the Sava are in an area, designated for the construction of new hydroelectric power plants. Materials and methods Flora and vegetation along the Sava and the So~a Rivers (Figs. 1, 2) were studied ac- cording to the established central-European methods (BRAUN-BLANQUET 1964, EHREN- DORFER and HAMANN 1965). Floristic records and phytosociological relevés were entered into the FloVegSi database (SELI[KAR et al. 2003). The same application was used to make the distribution map (Fig. 2). When processing the relevés we transformed the combined cover-abundance values with numerical values (1–9) according to van der MAAREL (1979). Numerical comparisons were performed with the SYN-TAX 2000 program package (PODANI 2001). The relevés were compared by means of »(unweighted) average linkage method« – UPGMA and principal coordinates analysis (PCoA). Wishart’s similarity ratio was used in all the methods. The nomenclature source for the names of vascular plants is the Mala flora Slovenije (MARTIN^I^ et al. 2007), MARTIN^I^ (2003) for the names of mosses and THEURILLAT (2004) for the names of the syntaxa. Ecological description of the study area The study area with Leontodon hispidus subsp. brumatii belongs to the pre-Alpine phytogeographical region (M. WRABER 1969). In terms of landscape regions it forms a part of the Sava valley or, more widely speaking, of the Posavsko hribovje region (PERKO and ORO@EN ADAMI^ 1998). From Litija towards Zidani Most the Sava initially still runs through a relatively wide valley which narrows at the village of Sava and remains narrow with steep banks throughout its course. On the right bank of the river, up to Hrastnik, runs a regional road, and on the left bank the double track Ljubljana–Zagreb railway. The prevail- ing geological bedrock consists of Triassic dolomite and limestone, in some sections (in the vicinity of Litija, Podkraj pri Hrastniku) also Permian-carbon slate claystones and sand- stones (BUSER 1990). The climate is moderate continental. Mean annual air temperature in 52 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:00 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 53 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Fig. 1. Distribution of the taxon Leontodon hispidus subsp. brumatii in Slovenia with new localities in the Sava valley. Fig. 2. Localities of the taxon Leontodon hispidus subsp. brumatii in the Sava valley (central Slovenia). 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:01 Color profile: Disabled Composite 150 lpi at 45 degrees the period 1961–1990 was between 8 °C and 10 °C, mean January temperature –2 °C to 0 °C and mean July temperature 18 °C to 20 °C (CEGNAR 1998). Mean annual precipitation in the same period was between 1200 mm and 1400 mm (ZUPAN^I^ 1998). The Sava River is torrential in this section and its level rapidly increases after heavy rain; rocky ledges along the river are partly or entirely flooded at least ten times a year (Fig. 3). Normally, there is a short period in May when the water level is low, and a longer period favourable for the de- velopment of the vegetation in the summer months from July to September (Hydrological data ARCHIVE 2008). Dolomite slopes above the Sava are overgrown with basophilic beech forests (Ostryo-Fagetum, Arunco-Fagetum, Hacquetio-Fagetum), and in areas where clay slates are the dominant bedrock also with acidophilous beech forests (Blechno-Fagetum). On the colluvium (hillside scree) in the gorges and at the foot of slopes there are some sites of valuable broad-leaved species (Hacquetio-Fraxinetum, Veratro nigri-Fraxinetum, Tilio cordatae-Aceretum platanoidis ostryetosum). The steepest, rockiest sites at the right bank of the Sava (Reber between the village of Sava and Mo{enik; Reber between Zagorje and Trbovlje) are overgrown with basophilic forests of Scots pine and black pine (Genisto januensis-Pinetum sylvestris). On similarly steep, rocky sites on both banks of the river there are also sites of the community of pubescent oak and hop hornbeam (Querco pubescenti-Ostryetum carpinifoliae). On smaller areas on rare gravel sites grows a com- munity of grey and red willow (Salicetum eleagno-purpureae). The banks of the Sava between Litija and Zidani Most have been changed considerably, often reinforced with dry stone walls. Towards Zidani Most the river course becomes noticeably more placid and the banks flooded, due to the dam of the Bo{tanj hydroelectric power plant downstream. The best preserved natural slopes with rocky ledges are in the gorge between Hrastnik and Trbovlje and it is there that most of localities of Leontodon hispidus subsp. brumatii were found. Results Overview of the new localities of Leontodon hispidus subsp. brumatii in the Sava valley 9856/3 (UTM 33TWM00) Slovenia, Dolenjska, the Sava valley, the right bank of the Sava downstream from the hamlet of Ribnik (Dole`ak), riparian rocks and pioneer grey willow stands (Salicetum eleagno-purpureae), 200 m a.s.l., leg. et det. I. Dakskobler et B. Vre{, 12. May 2010, Herbarium LJS; the right bank of the Sava, upstream from the hamlet of Ribnik (Dole`ak) and the outfall of the Ribnik stream into the Sava, 205 m a.s.l. Det. B. Vre{, 8. June 2010. 9856/3 (UTM 33T WM00) Slovenia: [tajerska, Trbovlje, the left bank of the Sava, a rocky ledge at the Trbovlje thermal power plant; also to the east and southeast of this ther- mal power plant, under Ringa railway tunnel and further on to the foot of the hill Vi{tov vrh (opposite Ribnik or Dole`ak), 200 m a.s.l., Det. A. Seli{kar, 19. May 2010. 9856/3 (UTM 33T WM00) Slovenia: [tajerska, the Sava valley, Trbovlje, hamlet Za Savo, on several spots on the banks of the Sava under the farmsteads Vrstov{ek, Frajle, Frankovi~ and Kos, 200 m a.s.l. Det. B. Vre{, 27. July 2010. 9856/3 (UTM 33T WM00) Slovenia: Dolenjska, the Sava valley, Mitov{ek, Ribo- gojnica (fish hatchery), riparian rocks on the right bank of the Sava, 205 m a.s.l. Det. B. 54 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:01 Color profile: Disabled Composite 150 lpi at 45 degrees Vre{, 26. July 2010; Spodnji [klendrovec, under the road Prusnik – Mitov{ek, 210 m a.s.l.; Det. B. Vre{, 15. September 2010. 9856/4 (UTM 33T WM00) Slovenia: Dolenjska, the right bank of the Sava down- stream from Hrastnik, Podkraj, at the homesteads Rus and Tohar and several spots between them (under the Ravenski hrib hill), riparian rocks, 200 m a.s.l., leg. et det. I. Dakskobler et B. Vre{, 12. May 2010, I. Dakskobler et B. ^u{in, 17. June 2010, B. Vre{, 26. July 2010 and 7. October 2010, Herbarium LJS. 9856/4 (UTM 33T WM00) Slovenia: [tajerska, Hrastnik, the left bank of the Sava near the hamlet of Za Savo, to the east of the bridge across the river, riparian rocks, 200 m a.s.l., leg. et det. A. Seli{kar, 14. May 2010 and 20. July 2010, Herbarium LJS. 9856/4 (UTM 33T WM00) Slovenia: [tajerska, the Sava valley, Hrastnik, the foot of the Vi{tov vrh hill, riparian rocks and ledges on the left bank of the Sava (under the railway track) between Trbovlje and Hrastnik, at several spots, 200 m a.s.l., leg. et det. A. Seli{kar et I. Dakskobler, 18. May 2010, Herbarium LJS. 9856/4 (UTM 33T WM00) Slovenia: Dolenjska, the right bank of the Sava to the west of Hrastnik, under the filling station along the main road Zagorje–Hrastnik, 200 m a.s.l. Det. I. Dakskobler et A. Seli{kar, 18. May 2010. 9856/4 (UTM 33TWM10) Slovenia: [tajerska, the left bank of the Sava, below the vil- lage of Suhadol, flood bank along the Sava, 195 m a.s.l. Det. A. Seli{kar, 20. July 2010. 9955/2 (UTM 33TVM90) Slovenia: Dolenjska, the Sava valley, Renke, the right bank of the Sava downstream from [u{tarski most, a bridge across the Sava, 220 m a.s.l., ripar- ian rocks., leg. et det. I. Dakskobler et B. ^u{in, 17. May 2010, Herbarium LJS. 9955/2 (UTM 33TVM90) Slovenia: [tajerska, the Sava valley, Mo{enik, the left bank of the Sava, to the west of the [u{tarski most (a footbridge), rocks along the Sava, at the outfall of a tufa-forming stream, 220 m a.s.l. Det. A. Seli{kar and B. Vre{, 12. October 2010; Mo{enik, the left bank of the Sava, to the west of the bridge[u{tarski most, riparian rocks below the abandoned Mars homestead, 220 m a.s.l. Det. A. Seli{kar et B. Vre{, 12. October 2010. Leontodon brumatii was recorded on the banks of the Sava between Litija and Zidani Most at the altitude of 195 to 220 m, at 38 microlocalities in four sections: between the vil- lages of Sava and Zagorje (the westernmost localities are at Renke on the right and at Mo{enik at the left bank of the river), between Zagorje and Trbovlje (at Mitov{ek on the right and under the hamlet of Za Savo on the left bank of the river), between Trbovlje and Hrastnik (at Ribnik and the Hrastnik filling station on the right bank and at the foot of Vi{tov vrh on the left bank of the river, where it grows abundantly on riparian rocks) and between Hrastnik and Zidani Most or Rade~e (the easternmost locality is under the village Suhadol on the left bank and at the homestead Tohar in Podkraj on the right bank) and in three quadrants – 9955/2, 9856/3 and 9856/4 (Figs. 1, 2). Phytosociological description of the sites of L. brumatii in the Sava valley and in the So~a valley Conspectus of the established syntaxa: Asplenietea trichomanis Br.-Bl. in Meier et Br.-Bl. 1934 corr. Oberdorfer 1977 ACTA BOT. CROAT. 71 (1), 2012 55 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:01 Color profile: Disabled Composite 150 lpi at 45 degrees Potentilletalia caulescentis Br.-Bl. in Br.-Bl. et Jenny 1926 Cystopteridion fragilis Richard 1972 Triseto argentei-Leontodontetum brumatii ass. nov. hoc loco var. typica var. nov. var. Chamaecytisus purpureus var. nov. var. Deschampsisa cespitosa var. nov. Festuco-Brometea Br.-Bl. et Tüxen 1943 Scorzonero-Chrysopogonetalia Horvati} et Horvat in Horvati} 1958 = Scorzoneretalia villosae Horvati} 1975 Saturejion subspicatae Horvati} 1975 Centaurenion dichroanthae (Pignatti 1953) Poldini et Feoli Chiapella in Feoli Chiapel- la et Poldini 1993 Leontodonti brumatii-Seslerietum calcariae ass. nov. hoc loco chamaecytisetum purpureae subass. nov. hoc loco saxifragetum crustatae subass. nov. hoc loco Salicetea purpureae Moor 1958 Salicetalia purpureae Moor 1958 Salicion eleagno-daphnoidis (Moor 1958) Grass 1993 Salicetum eleagno-purpureae Sillinger 1933 petasitetosum hybridi ([ilc et ^u{in 2000) Oriolo et Poldini 2002 var. Populus nigra Dakskobler 2010 Leontodon hispidus subsp. brumatii is an endemic with a small distribution area. There are very few data on the communities in which it grows. It is known to grow on rocks (POLDINI 1991). The subspecies is not discussed on its own but together with Leontodon hispidus in the Flora alpina (AESCHIMANN et al. 2004). WRABER (1998) claims that it usually grows in a very characteristic environment, on riparian rocks that are periodically washed by river water. He stresses that the plant can also grow outside the direct influence of the water splashing, which was confirmed in our research in the So~a valley, where the studied taxon was recorded also on rocks and steep gravelly slopes that the river cannot reach even when the water level is at its highest. The specimens growing the highest above the Sava River level were found in a crevice of the retaining wall under the railway track, some 3.5 m above the low spring water level, and on a stony road slope approximately 5 m above the low spring water level. However, even these specimens are flooded when the water level is at its highest. The rivers So~a and Idrijca are torrential and have a similar water regime to that characteristic for the Sava River (Fig. 3). Interesting is the frequent occurrence of the subspecies L. brumatii under the Doblar hydroelectric power plant where the fluctuation of the water level and in turn inundation of the subspecies’ sites occurs on a daily basis. So far, no comprehensive phytosociological inventory of all its known localities in the So~a valley has been made, but we have made 15 relevés of this species at different locations over a longer time period. These relevés were compared to those from the Sava valley and thus the following results were obtained (Figs. 4, 5). In all of the comparisons the relevés from the Sava valley (ZS) were grouped separately from the relevés from the So~a valley (PO). Two phytosociological tables were made for both regions (Tabs. 1, 2). 15 relevés made in the Sava valley on the both banks of Sava be- 56 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:01 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 57 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Fig. 3. Water level (in cm) of the rivers Sava, So~a and Idrijca in 2008 (according to Hydrological data archive 2008). The red line marks the threshold of flooding of the sites of Leontodon hispidus subsp. brumatii. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:01 Color profile: Disabled Composite 150 lpi at 45 degrees 58 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Fig. 4. Dendrogram of communities with Leontodon hispidus subsp. brumatii from the So~a valley (PO) and from the Sava valley (ZA) – UPGMA, similarity ratio. Fig. 5. Two-dimensional scatter-diagram of communities with Leontodon hispidus subsp. brumatii from the So~a valley (PO) and from the Sava valley (ZA) – PCoA, similarity ratio. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:02 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 59 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Tab. 1. Communities with Leontodon hispidus subsp. brumatii in the Sava valley (central Slovenia). Fl – fluvisols, Li – lithosols. Number of relevé 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pr. Fr. Database number of relevé 23 68 27 23 74 03 23 57 95 23 53 37 23 58 27 23 58 28 23 73 87 23 54 01 23 54 48 23 54 49 23 58 30 23 54 06 23 71 60 23 52 13 23 58 29 Altitude in m 200 220 180 200 200 200 220 200 200 200 200 200 200 200 200 Aspect N S N S S S 0 0 SW SW 0 N 0 N 0 Slope in degrees 2 70 35 2 2 5 0 0 3 3 0 10 0 2 0 Parent material DA DA DA DA DA DA DA DA DA DA DA DA DA Alu Alu Soil Fl Li Li Li Li Li Li Li Li Li Li Li Li Fl Fl Stoniness in % 30 100 80 90 100 100 100 100 80 80 100 100 70 30 30 Cover in %: Tree layer E3 . . . . . . . . . . . . . . 20 Shrub layer E2 70 5 . 20 20 20 10 30 20 5 10 10 20 70 80 Herb layer E1 50 40 30 60 60 30 40 30 60 40 15 40 40 50 70 Moss layer E0 10 30 20 10 10 10 20 10 30 20 50 30 10 10 10 Relevé area (m2) 100 10 20 15 15 9 50 50 50 50 50 20 50 100 200 Number of species 30 13 13 11 16 20 16 32 25 20 18 24 12 57 44 Date of taking relevé 6. 9. 20 10 12 .1 0. 20 10 17 .6 .2 01 0 18 .5 .2 01 0 18 .5 .2 01 0 18 .5 .2 01 0 12 .1 0. 20 10 18 .5 .2 01 0 19 .5 .2 01 0 19 .5 .2 01 0 18 .5 .2 01 0 18 .5 .2 01 0 20 .7 .2 01 0 12 .5 .2 01 0 18 .5 .2 01 0 Locality R ib ni k R en ke H ra st ni k H ra st ni k H ra st ni k H ra st ni k M oš en ik H ra st ni k T rb ov lj e T rb ov lj e H ra st ni k H ra st ni k H ra st ni k R ib ni k (D ol e` ak ) H ra st ni k Quadrant 98 56 /3 99 55 /2 98 56 /4 98 56 /4 98 56 /4 98 56 /3 99 55 /2 98 56 /3 98 56 /3 98 56 /3 98 56 /3 98 56 /4 98 56 /4 98 56 /3 98 56 /3 Character and differential species of the syntaxa AT Leontodon hispidus subsp. brumatii E1 + 2 2 2 2 2 2 2 3 2 2 2 2 1 + 15 100 M Brachythecium rutabulum E0 . 3 1 1 1 + 2 + 2 1 1 3 1 + 1 14 93 M Cinclidotus fontinaloides E0 . . . . + 1 . 1 3 2 3 1 . + . 8 53 TR Trisetum argenteum E1 + . 1 . . + . . + + . 1 . . . 6 40 EP Chamaecytisus purpureus E1 . . . 2 2 1 . . . . . . . . . 3 20 FB Peucedanum oreoselinum E1 . . + 1 1 . . . . . . . . . + 4 27 ES Sesleria caerulea subsp. calcaria E1 . + . . 2 + + . . . . . . . + 5 33 FB Inula ensifolia E1 . . . . . + . . . . . . . . . 1 7 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:02 Color profile: Disabled Composite 150 lpi at 45 degrees 60 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Number of relevé 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pr. Fr. MA Deschampsia cespitosa E1 . . + . . 1 1 1 3 2 2 2 3 1 1 11 73 PM Phalaris arundinacea E1 . . . . . + + 1 + + + + + 1 + 10 67 SP Populus nigra E3 . . . . . . . . . . . . . . 2 1 7 SP Populus nigra E2b . . . 1 1 1 + 2 2 + + + 2 3 2 12 80 SP Populus nigra E2a . . . . . . . + . . 1 . . 1 1 4 27 SP Salix alba E2 . . . . + . . . + + + . . r + 6 40 SP Salix eleagnos E2b . . . . . + . . . . . 1 . + 1 4 27 SP Salix eleagnos E2a . . . . . . . + . . . . . + + 3 20 SP Salix purpurea E2b . . . . . + . 1 . + . . . 3 . 4 27 SP Salix purpurea E2a . + . . . . . . + . + . . 1 . 4 27 SP Salix purpurea E1 . . . . . . . . . . . . 2 . . 1 7 GU Petasites hybridus E1 . . . . . . . . . . . . . + . 1 7 FB Festuco-Brometea Genista tinctoria E1 . 2 . . . . . . . . . . . . + 2 13 PA Potentillion anserineae Rorippa sylvestris E1 . . 1 . . . . + + . + . 1 + + 7 47 Barbarea vulgaris E1 . . . . . . . + . + + . . + + 5 33 PP Potentillo- -Polygonetalia Agrostis stolonifera E1 . . . . . . 1 + + + . . + + . 6 40 Plantago major E1 . . . . . . . + + . + . . r + 5 33 Rumex crispus E1 . . + . . . . . . . . . . + . 2 13 MA Molinio- -Arrhenatheretea Taraxacum officinale E1 . + . . . + . . + . . + . + + 6 40 Trifolium pratense E1 . . . . . + . + + + . . . + + 6 40 Plantago lanceolata E1 . . . + + . . + . . . + . + . 5 33 Achillea millefolium E1 . . . . . . . + . + . . . r . 3 20 Centaurea carniolica E1 + . . . . . . . . . . . . + + 3 20 Dactylis glomerata E1 . . . . . . . + . . . + . . + 3 20 Galium mollugo E1 . + . . . . . . . . . . . + + 3 20 Ranunculus acris E1 . . . . . . . . . . . + . + + 3 20 Veronica chamaedrys E1 . . . . . . . . + . . . . + + 3 20 Pastinaca sativa E1 + . . . . . . . . . . . . r . 2 13 Lotus corniculatus E1 . . . . . + . . + . . . . . . 2 13 AV Artemisietea vulgaris Artemisia vulgaris E1 + . . + + . . + + . . . . + + 7 47 Erigeron annuus E1 + . . . . . . + . . + + + + + 7 47 Rumex obtusifolius E1 . . . . . . + + + + . + . + + 7 47 Euphorbia esula E1 . . . . . . . . + . . + . . + 3 20 Picris hieracioides E1 + . . . . . . . . . . . . . + 2 13 Tab. 1. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:02 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 61 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Number of relevé 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pr. Fr. PM Phragmiti- -Magnocaricetea Mentha aquatica E1 . . + . . . . . . + . . . . . 2 13 SP Salicetea purpureae Salix triandra E2b . . . . . + . . . . . . . . 1 2 13 AI Alnion incanae Rubus caesius E2a . + + 1 1 1 1 1 + . . + . 1 1 11 73 Ulmus laevis E2b . . . + + + . + . + . . . + 1 7 47 Ulmus laevis E2a . . . . . . . + . . + + . + . 4 27 Chaerophyllum hirsutum E1 . . . . . . . . . . . . . + + 2 13 AG Alnus glutinosa E2 . + . . . . 1 . . . . . . . . 2 13 FS Fagetalia sylvaticae Fraxinus excelsior E2a . . . . . . . + . . . . . + . 2 13 Scrophularia nodosa E1 . . . . . . . . . . . + . + . 2 13 Brachypodium sylvaticum E1 . . . . . . . . . . . . . + + 2 13 QF Querco-Fagetea Clematis vitalba E1 . . . . . . . + . . . . . . 1 2 13 RP Rhamno-Prunetea Crataegus monogyna E2b . . . . . . . . . + . . . . . 1 7 Crataegus monogyna E2a . . . . . . + + . . + . . . . 3 20 Cornus sanguinea E2a . . . . . . . . . . . . . + + 2 13 AR Agropyretea intermedii-repentis Poa compressa E1 . . . . . . . + . . . + . . . 2 13 BT Bidentetea tripartitae Rorippa palustris E1 + . . . . . . . . . 1 . . . . 2 13 FC Filipendulo- -Convolvuletea Helianthus tuberosus E1 + . . . . . . + . . + . . + 1 5 33 Saponaria officinalis E1 . . + . . . . + . . . . . + + 4 27 Echinocystis lobata E1 + . . . . . . . . . . . . + . 2 13 Mentha longifolia E1 . . . . . . . . . . . . . + + 2 13 GU Galio-Urticetea Solidago gigantea E1 + + . + + + + + + + + + . 1 1 13 87 Aegopodium podagraria E1 . . . . . . . . . . . . . + 1 2 13 Urtica dioica E1 . + . . . . . . . . . . . . + 2 13 O Other species Fallopia japonica E1 + . . . . . + . . . . . . 1 1 4 27 Poa sp. E1 . . + . . . . . . . . . . . + 2 13 Euphorbia nutans E1 . . . . . . . . . . . + . . + 2 13 Malus domestica E2a . . . . . . . . . . . . . + + 2 13 M Mosses Tortella sp. E0 . . . 1 1 1 . 1 + + 1 + . . . 8 53 Tab. 1. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:02 Color profile: Disabled Composite 150 lpi at 45 degrees tween Mo{enik and Hrastnik were grouped together (Tab. 1). In this area, L. brumatii mainly overgrows riparian rocks, rarely also coarse, riparian gravel, both being at least pe- riodically flooded (Figs. 6, 7). Phanerograms and some moss species grow only rarely on these rocks. In addition to L. brumatii the most abundant grass among the phanerograms is Deschampsia cespitosa. Other species, which are mostly the character species of cultivated meadows and nitrophilic ruderal communities, have only scattered and individual occur- rences. Only three of the relevés in table 1 (relevés 4 to 6) slightly resemble those in the So~a valley (Tab. 2), which is mainly due to the occurrence of Chamaecytisus purpureus, Peucedanum oreoselinum and Inula ensifolia. Even the subspecies Sesleria caerulea subsp. calcaria, which usually dominates in the relevés in the So~a valley (in addition to L. brumatii), is relatively rare on the riparian rocks in the Sava valley and is more abundantly represented in only one relevé. Most stands with L. brumatii in the Sava valley are described as a new association Triseto argentei-Leontodontetum brumatii ass. nov. In the floristic composition as a whole there are several species which indicate a partial similarity of the studied community with the communities with dominant Phalaris arundinacea that overgrow periodically flooded sites immediately along the mid-course of rivers subject to considerable fluctuation of water level and that are classified into the alliance Phalaridion arundinaceae Kopecký 1961 and the association Rorippo-Phalaridetum Kopecký 1961 (BALÁTOVÁ-TULÁ^KOVÁ et al. 1993). So far, this association in Slovenia has been docu- mented with only three relevés (PETRINEC 1999). In addition to its relevés the synoptic table (Tab. 3) includes also the relevés of the same association from the border region between Slovakia and Hungary (HRIVINÁK and UJHÁZY 2003). The synoptic table and numerical comparison of the three syntaxa (Figs. 8, 9) clearly demonstrate that our stands cannot be classified into the association Rorippo-Phalaridetum. They comprise only a few of the species diagnostic for the class Phragmiti-Magnocaricetea Klika in Klika et Novák 1941 (Mentha aquatica, Lycopus europaeus and Phalaris arundinacea) and only P. arundinacea 62 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Appendix to Tab. 1. Sporadic species: Festuco-Brometea: Petrorhagia saxifraga + (9), Medicago lupulina + (14), Potentillo-Polygonetalia: Ranunculus repens + (12), Potentilla reptans + (14), Molinio-Arrhena- theretea: Leontodon hispidus + (1), Leucanthemum ircutianum + (9), Cerastium holosteoides + (12), Crepis biennis + (14), Leucanthemum vulgare + (14), Rumex acetosa + (14), Vicia cracca + (14), Vicia sepium + (15), Artemisietea vulgaris: Cichorium intybus + (1), Tanacetum vulgare + (8), Phragmiti-Magnocaricetea: Lycopus europaeus + (8), Salicetea purpureae: Salix fragilis /E2b/ + (1), Salix fragilis /E2a/ + (2), Humulus lupulus + (1), Alnion incanae: Ulmus laevis /E1/ + (9), Peucedanum verticillare + (1), Cardamine impatiens + (14), Knautia drymeia subsp. intermedia + (14), Quercetalia pubescentis: Campanula rapunculoides + (3), Fraxinus ornus + (5), Ostrya carpinifolia + (14), Querco-Fagetea: Hieracium sabaudum + (1), Carex digitata + (2), Ficaria verna subsp. bulbifera + (14), Rhamno-Prunetea: Crataegus monogyna /E2b/+ (10), Rhamnus catharticus + (5), Rosa canina agg. + (14), Agropyretea intermedii-repentis: Equisetum arvense (14), Biden- tetea tripartitae: Polygonum lapathifolium + (1), Polygonum mite + (1), Filipendulo-Convolvuletea: Calystegia sepium + (8), Lythrum salicaria + (13), Stellarietea mediae: Amaranthus retroflexus + (1), Chenopodium album + (1), Digitaria sanguinalis + (1), Echinochloa crus-galli + (1), Polygonum persicaria + (1), Setaria pumila + (1), Solanum nigrum + (1), Poa annua + (10), Setaria viridis + (13), Cerastium glomeratum r (14), Other species: Acer negundo + (1), Ambrosia artemisiifolia + (1), Brassica sp. + (1), Agrostis sp. + (3), Ribes rubrum + (14), Physocarpus opulifolius + (7), Mosses: Musci div. + (2). 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:02 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 63 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Tab. 2. Communities with Leontodon hispidus subsp. brumatii in the So~a valley (western Slovenia). Li – lithosols Number of relevé 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pr. Fr. Database number of relevé 23 54 65 23 76 27 23 76 28 21 85 15 21 85 17 21 85 16 23 76 29 23 76 30 23 76 31 23 76 32 23 76 33 23 76 37 23 76 38 23 76 39 23 76 35 Altitude in m 176 200 200 83 84 83 120 120 120 120 120 230 220 220 160 Aspect 0 S E S E S W S W W N E N N W S W S W N E N N E N N E N N Slope in degrees 0 90 90 35 40 40 10 20 10 10 70 45 40 40 30 Parent material A AR AR AL AL AL A A A A A AR AR AR AR Soil Li Li Li Li Li Li Li Li Li Li Li Li Li Li Li Stoniness in % 100 100 100 100 100 100 90 100 90 60 100 30 30 30 90 Cover in %: Tree layer E3 0 0 0 0 0 0 0 0 0 0 0 5 0 0 0 Shrub layer E2 10 10 5 0 0 10 30 5 10 5 10 20 30 40 5 Herb layer E1 20 25 30 25 30 30 30 20 40 40 40 70 70 80 30 Moss layer E0 0 5 5 5 10 30 5 5 5 5 10 20 10 10 15 Relevé area (m2) 50 50 50 10 10 10 10 10 50 10 15 100 100 100 15 Number of species 14 29 18 20 13 18 25 22 25 22 36 37 37 33 17 Date of taking relevé 30 .5 .2 01 0 8. 5. 19 92 8. 5. 19 92 28 .4 .2 00 8 28 .4 .2 00 8 28 .4 .2 00 8 4. 10 .2 00 2 24 .7 .2 00 2 24 .7 .2 00 2 24 .7 .2 00 2 24 .7 .2 00 2 19 .6 .2 00 1 17 .5 .1 99 9 17 .5 .1 99 9 19 .6 .2 00 1 Locality S la p ob Id ri jc i L o{ ki po ld an L o{ ki po ld an A nh ov o A nh ov o A nh ov o V og r{ ~e k- S po pd nj i L og V og r{ ~e k- S po pd nj i L og V og r{ ~e k- S po pd nj i L og V og r{ ~e k- S po pd nj i L og V og r{ ~e k- S po pd nj i L og B u~ en ic a B u~ en ic a B u~ en ic a B u~ en ic a Quadrant 98 48 /4 98 48 /3 98 48 /3 99 47 /2 99 47 /2 99 47 /2 98 48 /3 98 48 /3 98 48 /3 98 48 /3 98 48 /3 98 48 /2 98 48 /2 98 48 /2 98 48 /2 Character and differential species of the syntaxa ES Sesleria caerulea subsp. calcaria E1 1 1 + 2 2 2 2 2 2 2 2 3 3 3 + 15 100 AT Leontodon hispidus subsp. brumatii E1 1 + + 2 2 1 1 1 + r + + + r + 15 100 EP Calamagrostis varia E1 . . . . . + + + + + 1 + + + 1 10 67 AT Hieracium porrifolium E1 . . . + . . 1 + + + + + + + . 9 60 ES Aster bellidiastrum E1 . . . . . . + + + . 1 + + + 1 8 53 AT Athamanta turbith E1 . 1 2 . . + + . + . + . + + . 8 53 AT Campanula carnica E1 . 1 + . . . . . . . . . . . . 2 13 AT Campanula pyramidalis E1 . + 1 . . . . . . . . . . . . 2 13 AT Sedum album E1 . + + . . . . . . . . . . . . 2 13 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:02 Color profile: Disabled Composite 150 lpi at 45 degrees 64 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Number of relevé 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pr. Fr. EP Chamaecytisus purpureus E1 . . . + 1 + 1 2 2 2 2 . . . . 8 53 FB Carex humilis E1 . . . + + + . + 1 2 1 . . . . 7 47 FB Centaurea scabiosa subsp. fritschii E1 . . . + . 1 1 + + + + . . . . 7 47 EP Allium ericetorum E1 . . . + . . 1 1 2 2 1 . . . . 6 40 FB Inula ensifolia E1 . . . . . . + 1 1 1 . . . . . 4 27 EP Erica carnea E1 . . . . . . + . . . . 2 2 1 + 5 33 AT Saxifraga crustata E1 . . . . . . . . . . . 2 2 2 r 4 27 Mo Laserpitium prutenicum E1 . . . . . . . . . . . 1 1 1 + 4 27 TR Petasites paradoxus E1 . . . . . . . . . . . 1 1 1 1 4 27 TR Campanula cespitosa E1 . . . . . . . . . . . 1 1 1 . 3 20 ES Rhinanthus aristatus E1 . . . . . . . . . . . + 1 + . 3 20 FB Stachys recta E1 . . . . . . . . . . . + + + . 3 20 AT Asplenietea trichomanis Asplenium ruta- muraria E1 . + + . + . . . . . . . . . . 3 20 Phyteuma scheuchzeri subsp. columnae E1 . . . . . . + + . . + . . . . 3 20 ES Elyno-Seslerietea Globularia cordifolia E1 . . . + . . . . + . . . + . . 3 20 FB Festuco-Brometea Genista tinctoria E1 . . + + + + + . . . . 1 + + . 8 53 Euphorbia cyparissias E1 + . . . 1 . + . + . + . . . . 5 33 Satureja montana subsp. variegata E1 . 1 1 . . . . . + + . . . + . 5 33 Peucedanum oreoselinum E1 . . . . . . 1 + + + . . . . + 5 33 Buphthalmum salicifolium E1 . . + . . . . . . . . 1 + 1 . 4 27 Bromopsis erecta E1 . + . + . . . . . + . . . . . 3 20 Koeleria pyramidata E1 + . . . . . . . . + . . . . . 2 13 Inula hirta E1 . . . . . . + . . . r . . . . 2 13 Ononis spinosa E1 . . . . . . . + . + . . . . . 2 13 Medicago falcata E1 . . . . . . . . + + . . . . . 2 13 Gymnadenia conopsea E1 . . . . . . . . . . r . + . . 2 13 Mo Molinion caeruleae SCF Parnassia palustris E1 . . . . . . . . . . . + + . . 2 13 MA Molinio- -Arrhenatheretea Taraxacum officinale E1 . . . r . + . r . . . . . . . 3 20 Lotus corniculatus E1 1 . . . . . . + . . . . . . . 2 13 Tab. 2. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:02 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 65 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Number of relevé 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pr. Fr. TG Trifolio-Geranietea Peucedanum cervaria E1 . + . . . + 1 1 . 1 + . . . . 6 40 TR Thlaspietea rotundifolii Achnatherum calamagrostis E1 . 1 1 . . . . . . . . + . . . 3 20 Peucedanum verticillare E1 . . . . . . . . . . r + . . . 2 13 Biscutella laevigata E1 . . . . . . . . . . . + 1 . . 2 13 EP Erico-Pinetea Aster amellus E1 . + 1 . . . + . + + 1 . + + . 8 53 Leontodon incanus E1 . + + . . . + 1 1 + 1 . . . . 7 47 Carex ornithopoda E1 . . . . . + . . . . . + + + . 4 27 Epipactis atrorubens E1 . . . . . . . . . . . 1 + . + 3 20 Pinus nigra E2b . . . . . . . . . . . 1 r r . 3 20 Pinus nigra E2a . . . . . . . . . . . r + . . 2 13 Polygala chamaebuxus E1 . . . . . . . . . . . 1 1 1 . 3 20 Chamaecytisus hirsutus E2a . . . + . + . . . . . . . . . 2 13 MuA Mulgedio-Aconitetea Salix appendiculata E2a . . . . . . + . . . + + + + + 6 40 QP Quercetalia pubescentis Fraxinus ornus E2b . . . . . . + . . . . . + 1 . 3 20 Fraxinus ornus E2a . + + . . + . + 1 + 1 1 1 1 . 10 67 Fraxinus ornus E1 . . . . . . . . . . . 1 1 1 + 4 27 Ostrya carpinifolia E2b . . . . . . . . . . . 1 1 2 . 3 20 Ostrya carpinifolia E2a . + . . . . . . + . . + 1 1 . 5 33 Lembotropis nigricans E1 . . . . . . . . . . + + + . . 3 20 Carex flacca E1 . . . . . . . . . . . 1 1 1 . 3 20 Campanula rapunculoides E1 . . . . r . . . . . + . . . . 2 13 Clematis recta E1 . . . . . . . . . . + . + . . 2 13 FS Fagetalia sylvaticae Mycelis muralis E1 . + + . . . . . . . . . . . . 2 13 Anemone trifolia E1 . . . . . . . . . . + . . . . 1 7 Lathyrus vernus E1 . . . . . . . . . . + . . . . 1 7 Ranunculus lanuginosus E1 . . . . . . . . . . r . . . . 1 7 Tilia cordata E2a + . . . . . . . . . r . . . . 2 13 QF Querco-Fagetea Clematis vitalba E2a . + + + + + . . + + . . . . . 7 47 Carex digitata E1 . . . . . . . . . . . . + 1 . 2 13 Tab. 2. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:03 Color profile: Disabled Composite 150 lpi at 45 degrees occurs at a higher frequency, but in modest abundance (mainly +). The decisive factor for the synsystematic classification of the studied stands is therefore the dominant L. brumatii, which is characteristic of wet rocks. Based on the available material the most sensible classification of the new association is therefore into the alliance Cystopteridion fragilis, order Potentilletalia caulescentis and class Asplenietea trichomanis, even though no other diagnostic species of the alliance, order and class have been recorded in these stands. 66 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Number of relevé 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pr. Fr. SP Salicetea purpureae Populus nigra E2a + . . . + + . . . . . . . . . 3 20 Salix eleagnos E2 1 . . . . . . . . . . . + + . 3 20 Salix purpurea E2a + . . . . + . . . . . . . . + 3 20 AV Artemisietea vulgaris Erigeron annuus E1 + . . r . . . . . . . . . . . 2 13 O Other species Festuca sp. E1 . . + . . . . . + . . . . . . 2 13 M Mosses Schistidium apocarpum E0 . 1 . . . . 1 + + 1 + . . . . 6 40 Tortella sp. E0 . + . + 1 . . . . . . 1 1 1 . 6 40 Tortella tortuosa E0 . . . . . . 1 1 1 1 + . . . 1 6 40 Cinclidotus fontinaloides E0 . . . + 1 2 . . . . . . . . . 3 20 Ctenidium molluscum E0 . . . . . . . . . . . 1 1 + . 3 20 Fissidens dubius E0 . . . . . . . . . . . + + + . 3 20 Collema sp. E0 . + + . . . . . . . . . . . . 2 13 Dicranum sp. E0 . . . . . . . . . . . + + . . 2 13 Musci div. E0 . . . . . . . . . . . + . . 2 2 13 Appendix to Tab. 2. Sporadic species: Asplenietea trichomanis: Hieracium austriacum + (1), Calamintha einseleana + (2), Sedum maximum + (2), Asplenium trichomanes + (2), Ceterach javorkeanum + (2), Paederota lutea + (15), Elyno-Seslerietea: Erigeron glabratus + (8), Festuco-Brometea: Allium carinatum subsp. pulchellum + (2), Thymus praecox + (4), Salvia pratensis + (7), Trifolium montanum + (11), Trifolio-Geranietea: Digitalis grandiflora + (2), Verbascum lychnitis r (2), Vincetoxicum hirundi- naria + (7), Lilium bulbiferum r (11), Thlaspietea rotundifolii: Hieracium bifidum + (1), Hieracium piloselloides + (1), Trisetum argenteum + (4), Silene vulgaris subsp. glareosa + (13), Erico-Pinetea: Molinia caerulea subsp. arundinacea + (14), Pinus sylvestris r (14), Vaccinio-Piceetea: Solidago virgaurea + (11), Picea abies + (14), Quercetalia pubescentis: Ostrya carpinifolia /E1/ 1 (12), Arabis turrita + (2), Coronilla emerus subsp. emeroides r (6), Sorbus aria + (11), Coronilla emerus subsp. emerus + (14), Fagetalia sylvaticae: Anemone trifolia + (11), Lathyrus vernus + (11), Ranunculus lanuginosus r (11), Tilia cordata /E2a/ r (11), Tilia cordata /E1/ + (12), Fagus sylvatica /E2/ r (12), Fagus sylvatica /E1/ + (12), Querco-Fagetea: Ulmus minor + (4), Pyrus pyraster + (9), Listera ovata + (11), Corylus avellana r (12), Quercus robur r (12), Salicetea purpureae: Salix eleagnos /E1/ + (12), Salix purpurea /E1/ + (4), Artemisietea vulgaris: Artemisia vulgaris + (1), Melilotus albus r (8), Other species: Mentha sp. + (15), Robinia pseudacacia r (5), Mosses: Homalothecium sericeum + (2), Encalypta streptocarpa + (11) Tab. 2. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:03 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 67 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Fig. 7. Typical site (habitat) of the Triseto argentei-Leontodontetum brumatii community in the Sava valley (Photo A. Seli{kar). Fig. 6. Leontodon hispidus subsp. brumatii on temporarily flooded riparian rocks in the Sava valley (central Slovenia) (Photo I. Dakskobler). 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:09 Color profile: Disabled Composite 150 lpi at 45 degrees 68 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Tab. 3. Synoptic table of the three riparian communities. Succesive number 1 2 3 Number of relevé 12 3 10 Author DSV VP HU Sign TL RP RP1 Asplenietea trichomanis Leontodon hispidus subsp. brumatii E1 100 . . Thlaspietea rotundifolii Trisetum argenteum E1 42 . . Phragmiti-Magnocaricetea Phalaris arundinacea E1 67 100 100 Mentha aquatica E1 17 . . Lycopus europaeus E1 8 100 10 Veronica anagallis-aquatica E1 . 66 . Glyceria notata E1 . 66 . Leersia oryzoides E1 . 66 . Rumex hydrolapathum E1 . 66 . Veronica becabunga E1 . 33 . Scrophularia umbrosa E1 . 33 . Berula erecta E1 . 33 . Carex pseudocyperus E1 . 33 . Iris pseudacorus E1 . . 50 Galium palustre E1 . . 30 Carex acuta E1 . . 20 Glyceria maxima E1 . . 20 Poa palustris E1 . . 10 Filipendulo-Convolvuletea Helianthus tuberosus E1 17 . . Saponaria officinalis E1 17 . . Calystegia sepium E1 8 . 50 Lythrum salicaria E1 8 33 40 Epilobium hirsutum E1 . 66 . Mentha longifolia E1 . 33 . Myosoton aquaticum E1 . 33 10 Galega officinalis E1 . 33 . Stachys palustris E1 . . 20 Echinocystis lobata E1 . . 10 Bidentetea tripartitae Rorippa palustris E1 8 . . Polygonum hydropiper E1 . 100 30 Polygonum lapathifolium E1 33 20 Ranunculus sceleratus E1 . 33 . Succesive number 1 2 3 Number of relevé 12 3 10 Author DSV VP HU Sign TL RP RP1 Bidens frondosa E1 . . 20 Atriplex prostrata E1 . . 10 Galio-Urticetea Solidago gigantea E1 83 . . Urtica dioica E1 8 33 90 Glechoma hederacea E1 . . 10 Lamium maculatum E1 . . 10 Artemisietea vulgaris Rumex obtusifolius E1 42 . 10 Artemisia vulgaris E1 33 . . Erigeron annuus E1 33 . . Euphorbia esula E1 20 . . Tanacetum vulgare E1 8 . . Stellarietea mediae Poa annua E1 8 . . Setaria viridis E1 8 . . Polgonum persicaria E1 . 33 . Galeopsis bifida E1 . 33 . Galium aparine E1 . 33 30 Cirsium arvense E1 . . 40 Lemnetea minoris Lemna minor E1 . 33 . Potametea pectinati Elodea canadensis E1 . 33 . Agropyretea intermedii-repentis Poa compressa E1 17 . . Elytrigia repens E1 . . 10 Potentillion anserineae Rorippa sylvestris E1 42 . 10 Barbarea vulgaris E1 25 66 . Alopecuros geniculatus E1 . 66 . Potentillo-Polygonetalia Agrostis stolonifera E1 42 66 . Plantago major E1 25 . . Rumex crispus E1 8 . 10 Ranunculus repens E1 8 . . 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:09 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 69 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Succesive number 1 2 3 Number of relevé 12 3 10 Author DSV VP HU Sign TL RP RP1 Molinietalia caeruleae Myosotis scorpioides E1 . 100 . Equisetum palustre E1 . . 10 Scirpus sylvaticus E1 . . 10 Molinio-Arrhenatheretea Deschampsia cespitosa E1 75 . . Taraxacum officinale E1 33 . . Trifolium pratense E1 33 . . Plantago lanceolata E1 33 . . Achillea millefolium E1 17 . . Dactylis glomerata s.str. E1 17 . . Lotus corniculatus E1 17 . . Galium mollugo E1 8 . . Ranunculus acris E1 8 . 10 Veronica chamaedrys E1 8 . . Leucanthemum ircutianum E1 8 . . Cerastium holosteoides E1 8 . . Poa trivialis E1 . 66 50 Alopecurus pratensis E1 . . 20 Symphytum officinale E1 . . 20 Lysimachia nummularia E1 . . 20 Carex hirta E1 . . 20 Potentilla anserina E1 . . 10 Vicia cracca E1 . 10 Festuco-Brometea s. lat. Peucedanum oreoselinum E1 25 . . Genista tinctoria E1 8 . . Petrorhagia saxifraga E1 8 . . Inula ensifolia E1 8 . . Salicetea purpureae Populus nigra E2 83 . . Salix alba E2 33 . . Salix eleagnos E2 25 . . Salix purpurea E2 58 . . Salix triandra E2 8 . . Salix fragilis E2 8 . . Succesive number 1 2 3 Number of relevé 12 3 10 Author DSV VP HU Sign TL RP RP1 Alnion incanae Rubus caesius E2 75 . 10 Ulmus laevis E2 67 . . Alnus glutinosa E2 17 . . Solanum dulcamara E1 . . 20 Equisetum arvense E1 . . 10 Humulus lupulus E1 . . 10 Fagetalia sylvaticae Carpinus betulus E2 17 . . Fraxinus excelsior E2 8 . . Scrophularia nodosa E1 8 . . Quercetalia pubescentis Campanula rapunculoides E1 8 . . Fraxinus ornus E1 8 . . Querco-Fagetea Clematis vitalba E1 8 . . Carex digitata E1 8 . . Rhamno-Prunetea Crataegus monogyna E2 33 . . Rhamnus catharticus E2 8 . . Erico-Pinetea Sesleria caerulea subsp. calcaria E1 33 . . Chamaecytisus purpureus E1 25 . . Calamagrostis varia E1 8 . . Other species Fallopia japonica E1 8 . . Poa sp. E1 8 . . Agrostis sp. E1 8 . . Physocarpus opulifolius E2 8 . . Galium rivale E1 . . 10 Mosses Brachythecium rutabulum E0 100 . . Cinclidotus fontinaloides E0 58 . . Tortella sp. E0 67 . . 1: Triseto-Leontodontetum – this paper; 2: Rorippo-Phalaridetum – Petrinac 1999; 3: Rorippo-Phalaridetum – Hrivinák and Ujházy 2003 Tab. 3. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:09 Color profile: Disabled Composite 150 lpi at 45 degrees 70 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Fig. 8. Dendrogram of the two riparian communities (TL – Triseto-Leontodontetum, RP and RP1 – Rorippo-Phalaridetum) – UPGMA, similarity ratio. Fig. 9. Two-dimensional scatter-diagram of two riparian communities (TL – Triseto-Leontodonte- tum, RP and RP1 – Rorippo-Phalaridetum) – PCoA, similarity ratio. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees Diagnostic species of the new association are Leontodon brumatii (dominant spe- cies), Trisetum argenteum and some riparian mosses of which we established two – Brachythecium rutabulum and Cinclidotus fontinaloides. Trisetum argenteum is a character species of scree communities, especially in the subalpine and alpine belts (AESCHIMANN et al. 2004). It is relatively frequently deposited and preserved on riparian rocks along the central or lower course of Alpine rivers, e.g. in Slovenia along the So~a and the Sava, so it is also a good indicator of the site or community of L. brumatii on riparian rocks. The nomenclature type of the new association, holotypus, is relevé No. 12 in table 1. The new association is sub- divided into three variants: the typical (relevés 2 and 3 in table 1); the variant with Chamaecytisus purpureus (the differential species are also Peucedanum oreoselinum, Sesle- ria caerulea subsp. calcaria and Inula ensifolia) – relevés 4 to 6 in table 1– these stands in- dicate a possible transition into the community Leontodonti brumatii-Seslerietum calcariae described hereinafter, i.e. into the initial riparian grassland; and the variant with Descham- psia cespitosa (the differential species is also Phalaris arundinacea) – relevés 7 to 13 in table 1. Everywhere sand accumulates in the runnels carved into the rocks or in coarse gravel, conditions are created that facilitate successional development towards riparian willow stands with black poplar, which respond particularly well to sufficient amount of fine particles (BO@I^ et al. 2008). The stands of this variant therefore indicate potential succes- sional development into the community Salicetum eleagno-purpureae var. Populus nigra, into which relevés No. 14 and 15 were classified (see DAKSKOBLER 2010). Individual shoots of tree species Populus nigra, Ulmus laevis and Salix alba occur also in other relevés. Most of the relevés in table 2 (the So~a valley) are classified into the new association Leontodonti brumatii-Seslerietum calcariae ass. nov. Its stands characterize the initial stony riparian grassland on undeveloped soil (lithosol). The species composition belongs to very different phytosociological groups (Tab. 4); the largest, some 21 %, is the ACTA BOT. CROAT. 71 (1), 2012 71 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Tab. 4. Structure of the association Leontodonti brumatii-Selserietum calcariae according phytoso- ciological groups (in %). Asplenietea trichomanis 13 Elyno-Seslerietea 10 Festuco-Brometea 21 Molinion caeruleae 1,4 Molinio-Arrhenatheretea 1,4 Scheuchzerio-Caricetea fuscae 0,7 Trifolio-Geranietea 2,5 Thlaspietea rotundifolii 5,1 Erico-Pinetea 21 Vaccinio-Piceetea 0,7 Mulgedio-Aconitetea 2,2 Quercetalia pubescentis 9,5 Fagetalia sylvaticae 2,2 Querco-Fagetea 4,4 Salicetea purpureae 2,9 Artemisietea vulgaris 0,7 Other species 1,1 Total 100 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees proportion of species of dry grasslands from the class Festuco-Brometea and species of basophilic pine forests from the class Erico-Pinetea, followed by chasmophytic species (Asplenietea trichomanis), species of subalpine grasslands (Elyno-Seslerietea) and thermophilic oak forests (Quercetalia pubescentis), which have a proportion of 10 %. Varied species composition also indicates a certain similarity with the communities of thermophilic forest edges from the class Trifolio-Geranietea, although it features a small proportion of diagnostic species of this class (2.5 %). In support of the synsystematic classification a synoptic table was made (Tab. 5), into which two riparian meadow communities – Centaureo dichroanthae-Globularietum cordifoliae Pignatti 1953 (FEOLI 72 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Tab. 5. Synoptic table of pioneer grassland and fringe vegetation. Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Asplenietea trichomanis Leontodon hispidus subsp. brumatii E1 100 . . . . Hieracium porrifolium E1 75 36 . . . Athamanta turbith E1 50 . . . . Saxifraga crustata E1 33 . . . . Phyteuma scheuchzeri subsp. columnae E1 25 . . . . Asplenium ruta-muraria E1 8 . . . . Paederota lutea E1 8 . . . . Seseli gouanii E1 . 43 . . . Dianthus sylvestris E1 . 7 . . 10 Silene hayekiana E1 . . 33 . . Elyno-Seslerietea . . . . . Sesleria caerulea subsp. calcaria E1 100 86 Aster bellidiastrum E1 67 7 . . . Globularia cordifolia E1 25 100 33 . . Rhinanthus aristatus E1 25 14 11 . . Erigeron glabratus E1 8 . . . . Phyteuma orbiculare E1 8 . . . . Carex mucronata E1 . 93 . . . Helianthemum alpestre E1 . 36 . . . Dryas octopetala E1 . 14 . . . Gentiana clusii E1 . 7 . . . Carlina acaulis s. lat. E1 . 7 89 . 20 Helianthemum nummularium subsp. grandiflorum E1 . . 89 . . Ranunculus carinthiacus E1 . . 56 . . Betonica alopecuros E1 . . 44 . . Galium anisophyllon E1 . . 33 . . Alchemilla glaucescens E1 . . 22 . . Gentiana verna E1 . . 11 . . 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 73 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Hieracium valdepilosum E1 . . 11 . . Hieracium villosum E1 . . 11 . . Festuca calva E1 . . 11 . . Phyteuma orbiculare E1 . . 11 . . Festuco-Brometea Carex humilis E1 58 86 11 70 10 Centaurea scabiosa (inc. subsp. fritschii) E1 58 . 44 10 70 Genista tinctoria E1 58 . 11 10 10 Peucedanum oreoselinum E1 42 93 56 70 60 Inula ensifolia E1 33 86 . . 10 Euphorbia cyparissias E1 33 21 44 50 90 Satureja montana subsp. variegata E1 25 14 . 10 . Stachys recta E1 25 . . 30 50 Buphthalmum salicifolium E1 25 7 . 50 80 Bromopsis erecta E1 17 . 100 50 30 Inula hirta E1 17 . . 50 10 Ononis spinosa E1 17 . 22 . . Medicago falcata E1 17 . . 40 10 Gymnadenia conopsea E1 17 29 78 10 . Koeleria pyramidata E1 8 . 100 30 40 Thymus praecox s. lat. E1 8 7 78 10 50 Salvia pratensis E1 8 . 78 30 70 Trifolium montanum E1 8 . 56 50 20 Allium carinatum s. lat. E1 7 . 44 . 30 Centaurea dichroantha E1 . 100 . . . Teucrium montanum E1 . 93 11 10 10 Fumana procumbens E1 . 93 . . . Stipa eriocaulis E1 . 93 . 10 . Galium lucidum E1 . 93 . 30 . Plantago holosteum E1 . 86 67 . . Thesium divaricatum E1 . 71 . . . Bromopsis condensata E1 . 71 . . . Genista sericea E1 . 64 . . . Thymus longicaulis E1 . 64 . . . Chrysopogon gryllus E1 . 64 . 10 10 Helianthemum nummularium subsp. obsurum E1 . 64 . 10 40 Scorzonera austriaca E1 . 57 . 50 . Linum tenuifolium E1 . 50 . . . Cytisus pseudoprocumbens E1 . 50 . . . Potentilla australis E1 . 43 . . . Leontodon crispus E1 . 43 . 10 . Tab. 5. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees 74 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Asperula cynanchica E1 . 43 22 10 70 Orchis morio E1 . 43 . . . Scabiosa graminifolia E1 . 36 . . . Dianthus monspessulanus E1 . 36 . 10 10 Hippocrepis comosa E1 . 36 78 10 . Teucrium chamaedrys E1 . 29 . 30 90 Plantago argeneta E1 . 21 33 30 . Sanguisorba muricata (inc. S. minor) E1 . 21 100 10 40 Galium verum E1 . 21 89 . 80 Carex liparocarpos E1 . 14 . . . Asperula purpurea E1 . 14 . . . Scabiosa triandra E1 . 14 67 . 40 Festuca rupiciola (inc. F. pseudovina, F. ovina agg.) E1 . 14 100 30 50 Anacamptys pyramidalis E1 . 14 . . . Carex caryophyllea E1 . 14 78 . . Hypochoeris maculata E1 . 14 . . 10 Globularia elongata E1 . 14 . . . Allium senescens E1 . 14 11 . . Botriochloa ishaemum E1 . 7 . . . Ophrys apifera E1 . 7 . . . Centaurea bracteata (C. gaudinii) E1 . 7 . . . Betonica serotina E1 . 7 . . . Gentianella pilosa E1 . 7 56 . . Hieracium pilosella E1 . 7 11 10 . Brachypodium rupestre E1 . . 100 70 80 Pimpinella saxifraga E1 . . 100 30 60 Plantago media E1 . . 100 10 30 Prunella grandiflora E1 . . 89 10 20 Briza media E1 . . 89 30 30 Medicago lupulina E1 . . 89 10 20 Polygala comosa E1 . . 89 . . Silene vulgaris subsp. vulgaris E1 . . 89 . 20 Orchis ustulata E1 . . 89 . . Campanula rotundifolia E1 . . 79 . . Campanula glomerata E1 . . 78 . . Orchis militaris E1 . . 67 . . Linum catharticum E1 . . 56 . 20 Ranunculus bulbosus E1 . . 44 . . Euphrasia stricta E1 . . 22 . . Potentilla pusilla E1 . . 11 . . Arabis hirsuta E1 . . 11 . . Tab. 5. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 75 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Astragalus onobrychis E1 . . 11 . . Cuscuta epithimum E1 . . 11 . 10 Carlina vulgaris E1 . . 11 . . Filipendula vulgaris E1 . . 11 70 60 Orobanche gracilis E1 . . 11 . . Gentianella ciliata E1 . . 11 . . Rhinanthus freynii E1 . . 11 . . Hypochoeris maculata E1 . . 11 30 10 Cirsium pannonicum E1 . . . 70 30 Euphorbia verrucosa E1 . . . 70 30 Knautia illyrica E1 . . . 50 . Dorycnium germanicum E1 . . . 50 60 Vicia tenuifolia E1 . . . 30 . Genista sylvestris E1 . . . 30 . Centaurea rupestris E1 . . . 30 . Scorzonera villosa E1 . . . 30 . Veronica barrelieri E1 . . . 10 . Euphorbia nicaeensis E1 . . . 10 . Thesium linophyllum E1 . . . 10 . Pulsatilla montana E1 . . . 10 . Lychnis viscaria E1 . . . . 60 Scabiosa hladnikiana E1 . . . . 30 Prunella laciniata E1 . . . . 20 Cuscuta epithymum E1 . . . . 20 Ornithogalum sphaerocarpum E1 . . . . 20 Anthyllis vulneraria E1 . . . . 10 Thero-Brachypodietea Koeleria lobata E1 . 100 . . . Artemisia alba E1 . 29 . . . Eryngium amethystinum E1 . 21 . . 10 Campanula sibirica E1 . 21 . . . Medicago prostrata E1 . 7 . . . Melica ciliata E1 . 7 . . . Koelerio-Corynephoretea Cardaminopsis arenosa E1 . . 33 . . Sedum sexangulare E1 . . 22 . . Cerastium brachypetalum E1 . . 22 . . Petrorhagia saxifraga E1 . . 11 . . Molinion caeruleae Laserpitium prutenicum E1 33 . . . . Molinia caerulea subsp. caerulea E1 . . 11 . . Tab. 5. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees 76 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Carex distans E1 . . 11 . . Carex tomentosa E1 . . 11 . . Sanguisorba officinalis E1 . . 11 . . Herminium monorchis E1 . . 11 . . Inula salicina E1 . . . 10 20 Selinum carvifolia E1 . . . . 10 Molinio-Arrhenatheretea Taraxacum officinale E1 25 . . . . Lotus corniculatus agg. E1 8 29 89 50 30 Dactylis glomerata E1 . 29 89 10 80 Senecio jacobea E1 . 14 . 10 . Leontodon hispidus subsp. hispidus E1 . . 100 . 10 Trifolium pratense E1 . . 89 . . Centaurea jacea E1 . . 78 10 70 Achillea millefolium E1 . . 78 . 50 Galium mollugo (inc. G. album) E1 . . 78 . 30 Helictotrichon pubescens E1 . . 78 . . Prunella vulgaris E1 . . 78 . . Rhinanthus minor E1 . . 67 . 10 Trifolium repens E1 . . 67 . . Vicia cracca E1 . . 67 . . Leucanthemum ircutianum (inc. L. vulgare) E1 . . 67 10 30 Plantago lanceolata E1 . . 56 . . Orchis coriophora subsp. coriophora E1 . . 56 . . Ranunculus acris E1 . . 44 . . Euphrasia rostkoviana E1 . . 44 . . Lathyrus pratensis E1 . . 44 10 40 Leontodon autumnalis E1 . . 44 . . Tragopogon pratensis E1 . . 44 . 10 Ranunculus nemorosus E1 . . 33 . . Rumex acetosa E1 . . 33 . . Luzula campestris E1 . . 33 . . Festuca pratensis E1 . . 22 . . Achillea roseoalba E1 . . 22 . . Carex hirta E1 . . 11 . . Trifolium campestre E1 . . 11 . . Knautia arvensis E1 . . 11 . 30 Festuca arundinacea E1 . . 11 . . Heracleum sphondylium E1 . . 11 . . Pimpinella major E1 . . 11 . . Allium scorodoprasum E1 . . 11 . . Tab. 5. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 77 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Stellaria graminea E1 . . 11 . . Bromus hordeaceus E1 . . 11 . . Veronica chamaedrys E1 . . . 10 20 Arrhenatherum elatius E1 . . . 10 . Knautia arvensis E1 . . . . 30 Festuca rubra E1 . . . . 30 Poa angustifolia E1 . . . . 20 Rumex acetosa E1 . . . . 10 Trisetum flavescens E1 . . . . 10 Calluno-Ulicetea Potentilla erecta E1 . . 78 . 10 Chamaecytisus supinus E1 . . . 30 . Chamaespartium sagittale E1 . . . 10 . Genista germanica E1 . . . . 10 Polygala vulgaris E1 . . . . 10 Scheuchzerio-Caricetea fuscae Parnassia palustris E1 17 . 33 . . Schoenus nigricans E1 . 79 . . . Carex panicea E1 . . 11 . . Trifolio-Geranietea Peucedanum cervaria E1 42 . . 100 100 Vincetoxicum hirundinaria E1 8 7 22 30 20 Lilium bulbiferum E1 8 . . . . Anthericum ramosum E1 . 43 . 50 80 Silene nutans E1 . . 89 30 30 Thalictrum minus E1 . . 33 70 40 Valeriana collina E1 . . 11 . 10 Ferulago galbanifera E1 . . . 90 . Dictamnus albus E1 . . . 70 . Iris illyrica E1 . . . 50 . Geranium sanguineum E1 . . . 50 70 Polygonatum odoratum E1 . . . 50 10 Paeonia officinalis E1 . . . 30 . Trifolium alpestre E1 . . . 30 . Viola hirta E1 . . . 30 70 Trifolium rubens E1 . . . 30 50 Coronilla coronata E1 . . . 20 . Trifolium medium E1 . . . 10 20 Ruta divaricata E1 . . . 10 . Verbascum austriacum E1 . . . 10 . Lathyrus latifolius E1 . . . 10 . Tab. 5. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees 78 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Lilium bulbiferum E1 . . . 10 . Hypericum perforatum E1 . . . 10 . Potentilla recta E1 . . . 10 . Origanum vulgare E1 . . . . 70 Clinopodium vulgare E1 . . . . 50 Coronilla varia E1 . . . . 20 Rosa gallica E1 . . . . 20 Veronica jacquiniii E1 . . . . 10 Melampyrum nemorosum E1 . . . . 10 Dianthus barbatus E1 . . . . 10 Inula conyza E1 . . . . 10 Veronica teucrium E1 . . . . 10 Lathyrus sylvestris E1 . . . . 10 Vicia tenuifolia E1 . . . . 10 Thlaspietea rotundifolii Petasites paradoxus E1 33 7 22 . . Campanula cespitosa E1 25 14 . . . Peucedanum verticillare E1 17 . . . . Biscutella laevigata E1 17 50 78 . . Achnatherum calamagrostis E1 8 14 . . . Trisetum argenteum E1 8 . . . . Silene vulgaris subsp. glareosa E1 8 7 . . . Euphorbia triflora subsp. kerneri E1 . 93 . . . Gypsophila repens E1 . 79 . . . Trinia glauca E1 . 71 . . . Matthiola carnica E1 . 57 . . . Hieracium piloselloides E1 . 50 22 . . Brassica glabrescens E1 . 36 . . . Crambe tataria E1 . 36 . . . Reseda lutea E1 . 21 . . . Diplotaxis tenuifolia E1 . 21 . . . Euphrasia cuspidata E1 . 14 . . . Rumex scutatus E1 . 7 . . . Rumex scutatus E1 . . 33 . . Hieracium glaucum E1 . . 11 . . Dianthus sternbergii E1 . . 11 . . Erico-Pinetea Calamagrostis varia E1 83 . 11 10 10 Chamaecytisus purpureus E1 67 57 11 . . Allium ericetorum E1 50 7 . . . Erica carnea E1 42 93 . . 20 Tab. 5. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 79 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Aster amellus E1 50 . 11 . 10 Leontodon incanus E1 42 7 . . . Carex ornithopoda E1 33 . . . . Epipactis atrorubens E1 25 . 11 . . Pinus nigra E2 25 . . . . Polygala chamaebuxus E1 25 7 . . . Chamaecytisus hirsutus E2 17 . . . 20 Molinia caerulea subsp. arundinacea E1 8 7 11 30 . Pinus sylvestris E2 8 . . . . Polygala nicaeensis subsp. forojulensis E1 . 43 11 10 . Daphne cneorum E1 . 14 . . . Genista januensis E1 . . . . 10 Vaccinio-Piceetea Solidago virgaurea E1 8 . . 10 60 Picea abies E2a 8 . 11 . . Mulgedio-Aconitetea Salix appendiculata E2a 50 . . . . Rhamno-Prunetea Cornus sanguinea E1 . . . 30 . Prunus mahaleb E1 . . . 20 . Crataegus monogyna E1 . . . 10 . Rhamnus rupestris E1 . . . 10 . Prunus spinosa E1 . . . 10 . Rosa canina E1 . . . 10 . Rubus fruticosus agg. E1 . . . . 10 Quercetalia pubescentis Fraxinus ornus E2a 75 7 . 30 . Ostrya carpinifolia E2a 33 7 . 10 30 Lembotropis nigricans E1 25 . . 10 20 Carex flacca E1 25 . 22 . 70 Campanula rapunculoides E1 17 . . 10 20 Clematis recta E1 17 7 . . 10 Coronilla emerus subsp. emeroides E1 8 . . . . Sorbus aria E2a 8 . . 10 . Coronilla emerus subsp. emerus E2a 8 . . . . Primula veris subsp. columnae E1 . . 89 . . Helleborus multifidus subsp. istriacus E1 . . . 50 . Sesleria autumnalis E1 . . . 30 . Mercurialis ovata E1 . . . 30 . Melittis melissophyllum E1 . . . 30 40 Lathyrus niger E1 . . . 20 10 Tab. 5. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:10 Color profile: Disabled Composite 150 lpi at 45 degrees 80 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Cnidium silaifolium E1 . . . 10 . Quercus pubescens E1 . . . 10 . Hypericum montanum E1 . . . 10 20 Tanacetum corymbosum E1 . . . . 20 Buglossoides purpurocaerulea E1 . . . . 20 Campanula persicifolia E1 . . . . 10 Quercus cerris E1 . . . . 10 Calamintha menthifolia E1 . . . . 10 Fagetalia sylvaticae Tilia cordata E2 17 . . . . Anemone trifolia E1 8 . . . . Lathyrus vernus E1 8 . . . . Ranunculus lanuginosus E1 8 . . . . Fagus sylvatica E2 8 . . . . Knautia drymeia E1 . . 11 . 30 Cyclamen purpurascens E1 . . . 10 . Salvia glutinosa E1 . . . . 20 Querco-Fagetea Clematis vitalba E2 42 . . 10 10 Carex digitata E1 17 . . . . Ulmus minor E1 8 . . . . Pyrus pyraster E2 8 . . . . Listera ovata E1 8 . 11 . . Corylus avellana E1 8 . . 20 . Quercus robur E1 8 . . . . Cruciata glabra E1 . . 67 . 20 Potentilla alba E1 . . . 70 . Betonica officinalis E1 . . . 70 70 Serratula tinctoria E1 . . . 30 30 Hepatica nobilis E1 . . . 10 . Carex montana E1 . . . 10 . Helleborus odorus E1 . . . . 30 Festuca heterophylla E1 . . . . 20 Hieracium racemosum E1 . . . . 10 Pteridium aquilinum E1 . . . . 10 Hedera helix E1 . . . . 10 Salicetea purpureae Salix eleagnos E2 25 7 . . . Salix purpurea E2 25 . . . . Populus nigra E2 17 . . . . Tab. 5. – continued 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:11 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 71 (1), 2012 81 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... Succesive number 1 2 3 4 5 Number of relevé 12 14 9 21 10 Author DSV CFP DZ GKL AC Sign LS CG GB CP GP Artemisietea vulgaris Erigeron annuus E1 8 . . . . Melilotus albus E1 8 . . . . Other species Festuca sp. E1 8 . . . . Mentha sp. E1 8 . . . . Robinia pseudacacia E1 8 . . . . Phalaris arundinacea E1 . . 11 . . Salix cinerea E1 . . 11 . . Fragaria vesca E1 . . . . 80 Verbascum nigrum E1 . . . . 30 Geranium phaeum E1 . . . . 20 Juniperus communis E1 . . . . 30 1: Leontodonti-Seslerietum calcariae, this paper 2: Centaureo dichroanthae-Globularietum cordifoliae, Feoli Chiapella and Poldini 1993 3: Gentianello pilosae-Brometum erecti, Dakskobler and Zavr{nik 2009 4: Cirsio-Peucedanetum cervariae, van Gils, Keysers and Launspach 1975 5: Geranio-Peucedanetum cervariae, ^arni 1998 Tab. 5. – continued Fig. 10. Dendrogram of pioneer grassland and fringe vegetation (LS – Leontodonti-Seslerietum cal- cariae, CG – Centaureo dichroanthae-Globularietum cordifoliae, GB – Gentianello pilo- sae-Brometum erecti, CP – Cirsio pannonicae-Peucedanetum cervariae, GP – Geranio- -Peucedanetum cervariae) – UPGMA, similarity ratio. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:11 Color profile: Disabled Composite 150 lpi at 45 degrees CHIAPELLA and POLDINI 1993), Gentianello pilosae-Brometum erecti Dakskobler et Za- vr{nik 2009 (DAKSKOBLER and ZAVR[NIK 2009), and two thermophilic forest edge com- munities – Cirsio pannonicae-Peucedanetum cervariae van Gils et al. 1975 (van GILS et al. 1975) and Geranio-Peucedanetum cervariae (KUHN 1937) T. Müller 1961 var. geogr. Knautia drymeia ^arni 1998 (^ARNI 1998) were ranged and compared using numerical methods. The results (Figs. 10, 11) clearly demonstrate that our stands are the most similar to the initial grassland on gravel sites of mountain rivers and streams in the foothills of the Southeastern Alps (association Centaureo dichroanthae-Globularietum cordifoliae) and are considerably different from thermophilic forest edge communities. Their floristic com- position is also clearly different from riparian stands of the association Gentianello pilosae-Brometum erecti. This community is much more species-rich and grows on more developed soils, rendzinas. The stands of the association Leontodonti brumatii-Seslerietum calcariae are a successional stage in the afforestation of riparian rocks towards scrub and forest communities (Seslerio albicantis-Ostryetum, Ostryo-Fagetum). In addition to some meadow species they are mainly characterized by diagnostic species or rock crevices, screes and basophilic pine forests. Diagnostic species of the new association are Leontodon hispidus subsp. brumatii, Sesleria caerulea subsp. calcaria, Calamagrostis varia, Hieracium porrifolium, Aster bellidiastrum and Athamanta turbith. The holotypus of the new associa- tion is relevé No. 7 in table 2. The new association is classified as an explicitly fringe associa- tion (non-typical; with its species composition it is close also to the classes Elyno-Sesle- rietea, Thlapietea rotundifolii and Asplenietea trichomanis), into the Illyrian-pre-Alpine 82 ACTA BOT. CROAT. 71 (1), 2012 DAKSKOBLER I., SELI[KAR A., VRE[ B. Fig. 11. Two-dimensional scatter-diagram of pioneer grassland and fringe vegetation (LS – Leonto- donti-Seslerietum calcariae, CG – Centaureo dichroanthae-Globularietum cordifoliae, GB – Gentianello pilosae-Brometum erecti, CP – Cirsio pannonicae-Peucedanetum cervariae, GP – Geranio-Peucedanetum cervariae) – PCoA, similarity ratio. 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:11 Color profile: Disabled Composite 150 lpi at 45 degrees suballiance Centaurenion dichroanthae, into the alliance Saturejion subspicatae, order Scorzonero-Chrysopogonetalia and class Festuco-Brometea. It is subdivided into two subassociations. The differential species of the subassociation Leontodonti-Seslerietum chamaecytisetum purpureae subass nov. are Chamaecytisus purpureus, Carex humilis, Allium ericetorum, Centaurea scabiosa subsp. fritschii and Inula ensifolia. Its nomen- clatural type is the holotypus of the association (relevé No. 7 in table 2); its sites are limestone riparian rocks. It is still flooded when the water level is high, but soil has already started accumulating in the runnels, which allows for a progressive development of the vegetation. The differential species of the subassociation Leontodonti-Seslerietum saxi- fragetum crustatae subass. nov. are Saxifraga crustata, Erica carnea, Laserpitium pruteni- cum, Campanula cespitosa, Petasites paradoxus and Stachys recta. The nomenclatural type, holotypus, is relevé No.13 in table 2. The sites of this subassociation are steep, gravelly, erosion slopes on platy limestone with addition of chert on the northeastern slopes of Bu~enica, some ten metres above the So~a between Tolmin and Most na So~i. The species composition indicates the development from a scree community through stony grassland into a thermophilic forest (Ostryo-Fagetum). The first three relevés in table 2 could not be classified into the new association. The floristic composition of relevé No. 1 in table 2 (rocky eyot in the Idrijca at Slap ob Idrijci) shows some similarities with the stands of the association Triseto-Leontodontetum, while relevés 2 and 3 in the same table represent a chasmophytic community, for the time being synsystematically still undefined, at the road cut between Podsela and Doblar, dominated by Athamanta turbith, Campanula carnica and C. pyramidalis. Discussion The new localities of the southeastern-Alpine endemic Leontodon hispidus subsp. brumatii in the Sava valley (central Slovenia, the Black Sea river basin), in the gorge of the Sava between the village of Sava and Zidani Most, are rather surprising, because so far this taxon was known in Slovenia only in the So~a basin (on riparian rocks along the So~a, Nadi`a, U~ja, Idrija and Idrijca), which belongs the Adriatic Sea river basin, but not along other Alpine rivers. Nevertheless, the new localities are situated in the region where quite a few species with predominantly Alpine distribution grow (e.g. Rhododendron hirsutum, Paederota lutea, Pinguicula alpina, Rosa pendulina, Cerastium subtriflorum, Tephroseris pseudocrispa, Aster bellidiastrum, Campanula carnica, C. cespitosa, Trisetum argenteum, Arabis alpina subsp. alpina, Astrantia carniolica, Acinos alpinus, Aconitum degenii subsp. paniculatum, Tofieldia calyculata, Myrrhis odorata – the latter is mentioned by PETKOV[EK 1939). The flora of the Sava valley also comprisessome species that most frequently occur in the So~a valley, but are usually much rarer in other landscape regions of Slovenia. Such species are for example Saxifraga petraea, Veratrum nigrum, Hemerocallis lilioaspho- delus, Spiraea chamaedryfolia. There are also some similarities between the forest com- munities of valuable broad-leaved species (e.g. the probable occurrence of the stands of two associations described in the So~a valley, Veratro nigri-Fraxinetum and Saxifrago petraeae-Tilietum, also in the Sava valley). It is also likely that the taxon L. brumatii occurs on suitable sites elsewhere in the Sava basin (and other Slovenian Alpine rivers), but has been overlooked. Riparian sites are usually difficult to access and are therefore not the sub- ject of a more detailed floristic inventory. The established differences in the communities ACTA BOT. CROAT. 71 (1), 2012 83 SOUTHEASTERN-ALPINE ENDEMIC LEONTODON HISPIDUS... 457 Dakskobler et al.ps U:\ACTA BOTANICA\Acta-Botan 1-12\457 Dakskobler_verzija-10.vp 26. o ujak 2012 10:49:11 Color profile: Disabled Composite 150 lpi at 45 degrees of L. brumatii between the So~a and the Sava valleys do not rule out the possibility that the stands of the association Triseto-Leontodontetum that was described in the Sava valley occur also in the So~a valley (which is very likely, because the sites in the So~a valley comprise a higher number of this endemic than those in the Sava valley). Similarly, the occurrence of the stands of the association Leontodonti-Seslerietum described in the So~a valley, is likely also in the Sava valley (already demonstrated in one of the relevés). Both newly described associations include phytocoenoses that are usually distributed in smaller areas and are more or less long-term successional stages. These are by nature subject to the river dynamics and can disappear from one spot only to reappear in another. They are extremely exposed to human interventions of any kind. The endemic Leontodon brumatii and its communities are a characteristic of riparian flora and vegetation of some of Slovenian mountain rivers. According to current knowledge, the localities in the Sava valley are explicitly disjunct and the southeasternmost in the entire known distribution area, so they deserve our attention and protection. The envisaged interventions along the central Sava, i.e. construction of new hydroelectric power plants, would most probably lead to destruction of suitable habitats for Leontodon brumatii. With a higher water level between Zagorje and Hrastnik, this endemic is likely to disappear from the river’s riparian zone, as has probably already happened downstream, before Zidani Most or Rade~e and further south. Acknowledgements The research in the Sava valley was conducted in the framework of the research programme Gradients and Biodiversity: Flora, Fauna and Vegetation (grant no. P1-0236), funded by Slovenian Research Agency, and of the assignment Inventory of plant species in the middle Sava area (commissioned by the HSE d.o.o.). Bo{ko ^u{in, MSc, helped us in the field. Associate professor Andra` ^arni, PhD and Urban [ilc, PhD, helped us with liter- ature sources. Iztok Sajko prepared figures 1 and 2 for print. Sincere thanks to two anony- mous reviewers for their helpful remarks, instructions, corrections and improvements. English translation by Andreja [alamon Verbi~. References AESCHIMANN, D., LAUBER, K. D. M., MOSER, D. M.,THEURILLAT, J.-P., 2004: Flora alpina, 2: Gentianaceae–Orchidaceae. Haupt Verlag, Bern, Stuttgart, Wien. BO@I^, G., VILHAR, U., URBAN^I^, M., KOBAL, M., FERREIRA, A., KRAIGHER, H.,GREBENC, T., SINJUR, I., [TUPAR, B. 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