OPCE-STR.vp Acta Bot. Croat. 68 (1), 153–158, 2009 CODEN: ABCRA 25 Short communication ISSN 0365–0588 Potentilla ´ aurulenta Gremli (Rosaceae), a nothospecies new to Poland JEREMI KOLV ODZIEJEK* Department of Geobotany and Plant Ecology, University of LV ódzb, Banacha 12/16, 90-237 LV ódzb, Poland Potentilla ´aurulenta Gremli (= P. heptaphylla L. ´ P. tabernaemontani Aschers.) is re- ported for the first time from Poland. The morphological characteristics, ecological re- quirements, and distribution of the nothospecies are presented together with photographic documentation. Keywords: Potentilla ´aurulenta, taxonomy, Poland Introduction During an expedition to Wzgórza Trzebnickie, Poland, in May 2004, the author found specimens of Potentilla that differ from the congeners in Poland. After a morphological study, literature searches (ZIMMETER 1884, WOLF 1908, SZAFER and PAWLV OWSKI 1955, SOJÁK 1995, GERSTBERGER 2002, KURTTO et al. 2004) and examination of many species, the author concluded that it represents the hybrid of P. heptaphylla L. and P. tabernaemontani Aschers. Methods Morphological features of the species Potentilla ´aurulenta were described and com- pared with those of P. heptaphylla L. and P. tabernaemontani (Tab. 1). Basal leaves of Potentilla ´aurulenta from herbarium material were rehydrated by boiling in water and detergent. Two small pieces of leaves were cut from the lateral, right leaflet and subjected to critical point drying. For scanning electron microscopy (SEM), samples were mounted on metal stubs, spattered with technical gold (Pelco S.C. 6 coating system), examined and photographed using a Tesla BS 340 scanning electron microscope. The hair types were analyzed on 5 photographs for each taxon. The phytocoenoses were analysed according to the Central European Zürich – Mont- pellier school (BRAUN-BLANQUET 1964). The positions of the localities of Potentilla ´aurulenta were determined by GPS Garmin eTrex Vista. ACTA BOT. CROAT. 68 (1), 2009 153 * Corresponding address, e-mail: kolo@biol.uni.lodz.pl U:\ACTA BOTANICA\Acta-Botan 1-09\Kolodziejek2.vp 22. travanj 2009 12:52:59 Color profile: Disabled Composite 150 lpi at 45 degrees Nomenclature of taxa was used according to WOLF (1908) and KURTTO et al. (2004). The abbreviations of herbaria correspond with the index of herbaria (HOLMGREN et al. 1990). Results and discussion Potentilla ´aurulenta Gremli (= P. heptaphylla L. ´ P. tabernaemontani Aschers.) (Figs. 1, 3, 4) Excurs.-Fl. Schweiz. 12.1884. – P. subopaca Zimmeter, Jahres.-Ber. Staats-Ober.- -Realschule Steyr. 14, 20. 1884. – Synonymized by WOLF (1908: 604). – P. explanata Zimmeter, Jahres.-Ber. Staats-Ober.-Realschule Steyr. 14, 20. 1884. – Synonymized by SOJÁK (1995: 313). – P. matzialekii Domin, Sitzber. Böhm. Ges. Wiss. 25: 33. 1903. – Synonymized by WOLF (1908: 604). Indicatio Locotypica: Schwitzerland, Osterfingerbad bei Schaffhausen. – Original Material: not traced. Characteristic features (Tab. 1): Perennial with slender stock; lateral flowering stems up to 30–40 cm, mostly branched above middle with hairs borne on minute tubercles. Basal 154 ACTA BOT. CROAT. 68 (1), 2009 KOLV ODZIEJEK J. Tab. 1. Comparison of main diagnostic characters among P. heptaphylla L., P. tabernaemontani Aschers. and the hybrid Potentilla ´aurulenta Gremli. Character P. heptaphylla P. tabernaemontani Potentilla ´aurulenta Stems with slender stock; lateral flowering stems up to 40 cm with numerous procumbent woody stems freely rooting at the nodes; lateral flowering stems not more than 10 cm high with slender stock; lateral flowering stems up to 30–40 cm Leaflets ovate-lanceolate, dentate or creneate-dentate cuneate-oblanceolate, dentate or cuneate- -dentate ovate-lanceolate, dentate Stipules stipules of basal leaves ovate- -lanceolate, acute stipules of basal leaves linear to linear-triangular stipules of basal leaves lanceolate, acute Hairiness hairs on stems and leaves with soft hairs borne on minute tubercles at base, and shorter, often reddish multicellular glandular hairs hairiness consisting of simple curved hairs only hairiness consisting of mixture of simple curved and straight hairs borne on minute tubercles at base Sepals ovate-lanceolate; epicalyx segments linear-lanceolate, as long as or shorter than sepals ovate, epicalyx segments lanceolate, obtuse, much shorter than sepals ovate, epicalyx segments lanceolate, obtuse, shorter than sepals Petals 5–7 mm 6–10 mm 5–10 mm U:\ACTA BOTANICA\Acta-Botan 1-09\Kolodziejek2.vp 17. travanj 2009 11:19:47 Color profile: Disabled Composite 150 lpi at 45 degrees ACTA BOT. CROAT. 68 (1), 2009 155 POTENTILLA ´ AURULENTA A NOTHOSPECIES NEW TO POLAND Fig. 1. Representative specimens of Potentilla ´aurulenta Gremli. A B C D E F G A B C D E F G A B C D E F G A B C D E F G Fig. 2. Distribution of Potentilla ´aurulenta Gremli – cartographic square in Poland ATPOL (ZAJAC 1978). U:\ACTA BOTANICA\Acta-Botan 1-09\Kolodziejek2.vp 17. travanj 2009 11:19:49 Color profile: Disabled Composite 150 lpi at 45 degrees 156 ACTA BOT. CROAT. 68 (1), 2009 KOLV ODZIEJEK J. Fig. 3. Upper surface of leaflets glabrous and at margin with soft simple straight hairs borne on minute tubercles at base, Potentilla ´aurulenta Gremli (SEM). Fig. 4. Lower surface of leaflets on veins with simple curved hairs borne on minute tubercles at base; between veins with relatively sparse simple shorter, curved hairs, Potentilla ´auru- lenta Gremli (SEM). U:\ACTA BOTANICA\Acta-Botan 1-09\Kolodziejek2.vp 17. travanj 2009 11:19:50 Color profile: Disabled Composite 150 lpi at 45 degrees and lower stem leaves digitate with 5–7 leaflets; stipules of basal leaves lanceolate, acute. Terminal tooth at basal leaves equalling, slightly shorter or slightly longer than the adjacent lateral teeth. Leaves on upper side glabrous and at margin with soft simple straight hairs borne on minute tubercles at base. Lower surface of leaflets on veins and at margin with simple curved hairs borne on minute tubercles at base; between veins with relatively sparse simple shorter, curved hairs. Flowers numerous, in cymes. 5-merous, yellow. Sepals ovate-lanceolate; epicalyx-segments lanceolate shorter than sepals. Style conical at basal, slightly clavate at apex. Flowering: V–VIII. Specimens examined: Poland, Wzgórza Trzebnickie: Tarnowiec village near Trzeb- nica 51°13’56”N, 16°46’01”E, 164 m (BE37), 6.5.2004 J. KolVodziejek (LOD). Ecology: The plants grow in thermophilous xerothermic grasslands from the class Festuco-Brometea Br.Bl. et R.Tx. Phytosociological characteristic of the locality of Poten- tilla ´aurulenta is documented by the following relevé: Wzgórza Trzebnickie: Tarnowiec village near Trzebnica 51°13’56”N, 16°46’01”E, 164 m, 6.5.2004, 5´5 m, pH in H2O = 7.6; D = 10%: Hylocomium splendens 1, Tortella tortuosa +; C = 90%: Sedum sexangulare 3, Potentilla ´aurulenta 2, Fragaria viridis 1, Pimpinella saxifraga 1, Thymus serpyllum 1, Acinos arvensis +, Anthyllis vulneraria +, Briza media +, Centaurea scabiosa +, Galium vernum +, G. verum +, Leontodon hispidus +, Linum catharticum +, Poa pratensis +, Polygala comosa +, Potentilla tabernaemontani +, Primula officinalis r, Rhinanthus minor +, Sanguisorba minor +, Scabiosa ochroleuca +, Vicia cracca r. Acknowledgmens I would like to thank Dr. Thomas Gregor (Hochschule Vechta, Germany) for his help in identification of plants. References BRAUN-BLANQUET, J., 1964: Pflanzensoziologie. Grundzüge der Vegetationskunde. 3. Aufl. Springer Verlag, Wien. GERSTBERGER, P., 2002: Potentilla L. In: CONERT, H. J., HAMANN, A., SCHULTZE-MOTEL, W., WAGENITZ, G. (eds), G. Hegi. Illustrierte Flora von Mitteleuropa 4(2C), 109–205. Blackwell, Berlin. HOLMGREN, P. K., HOLMGREN, N. H., BARNETT, L. C., 1990: Index Herbariorum, 1: The her- baria of the world. New York Botanical Garden, Bronx. KURTTO A., LAMPINEN R., JUNIKKA L., 2004: Rosaceae (Spiraea to Fragaria, excl. Rubus). In: KURTTO, A., LAMPINEN, R., JUNIKKA, L. (eds.), Atlas Florae Europaeae. Distribution of vascular plants in Europe 13. Rosaceae (Spiraea to Fragaria, escl. Rubus). The Committee for Mapping the Flora of Europe, Societas Biologica Fennica, Vanamo, Helsinki. SOJÁK, J., 1995: Potentilla L. In: Slavik B. (ed.), Flora of the Czech Republic 4, 283–314. Academia, Praha. ACTA BOT. CROAT. 68 (1), 2009 157 POTENTILLA ´ AURULENTA A NOTHOSPECIES NEW TO POLAND U:\ACTA BOTANICA\Acta-Botan 1-09\Kolodziejek2.vp 22. travanj 2009 12:53:02 Color profile: Disabled Composite 150 lpi at 45 degrees SZAFER, W., PAWLV OWSKI, B., 1955: Potentilla L. In: SZAFER, W., PAWLV OWSKI, B. (eds), Flora Polska 7, 96–143. Wydawnictwo Naukowe PWN, Warszawa-Kraków. WOLF, T., 1908: Monographie der Gattung Potentilla L. Bibliotheca Botanica 71, 1–714. ZAJAC, A., 1978: Atlas of distribution of vascular plants in Poland. Taxon 27, 481–484. ZIMMETER, A., 1884: Die europäischen Arten der gattung Potentilla. Jahres-Bericht der k. k. Staats-Ober-Realschule in Steyr 14, 1–31. 158 ACTA BOT. CROAT. 68 (1), 2009 KOLV ODZIEJEK J. U:\ACTA BOTANICA\Acta-Botan 1-09\Kolodziejek2.vp 17. travanj 2009 11:19:50 Color profile: Disabled Composite 150 lpi at 45 degrees