REINWARDTIA 2017 16 (1) ISSN 0034 – 365 X | E-ISSN 2337 − 8824 | Accredited 792/AU3/P2MI-LIPI/04/2016 A JOURNAL ON TAXONOMIC BOTANY, PLANT SOCIOLOGY AND ECOLOGY REINWARDTIA A JOURNAL ON TAXONOMIC BOTANY, PLANT SOCIOLOGY AND ECOLOGY Vol. 16 (1): 1 – 48, June 15, 2017 Chief Editor Kartini Kramadibrata (Mycologist, Herbarium Bogoriense, Indonesia) Editors Dedy Darnaedi (Taxonomist, Herbarium Bogoriense, Indonesia) Tukirin Partomihardjo (Ecologist, Herbarium Bogoriense, Indonesia) Joeni Setijo Rahajoe (Ecologist, Herbarium Bogoriense, Indonesia) Marlina Ardiyani (Taxonomist, Herbarium Bogoriense, Indonesia) Himmah Rustiami (Taxonomist, Herbarium Bogoriense, Indonesia) Lulut Dwi Sulistyaningsih (Taxonomist, Herbarium Bogoriense, Indonesia) Topik Hidayat (Taxonomist, Indonesia University of Education, Indonesia) Eizi Suzuki (Ecologist, Kagoshima University, Japan) Jun Wen (Taxonomist, Smithsonian Natural History Museum, USA) Barry J Conn (Taxonomist, School of Life and Environmental Sciences, The University of Sydney, Australia) David G. Frodin (Taxonomist, Royal Botanic Gardens, Kew, United Kingdom) Graham Eagleton (Wagstaffe, NSW, Australia) Secretary Rina Munazar Layout Liana Astuti Illustrators Subari Wahyudi Santoso Anne Kusumawaty Correspondence on editorial matters and subscriptions for Reinwardtia should be addressed to: HERBARIUM BOGORIENSE, BOTANY DIVISION, RESEARCH CENTER FOR BIOLOGY– INDONESIAN INSTITUTE OF SCIENCES CIBINONG SCIENCE CENTER, JLN. RAYA JAKARTA – BOGOR KM 46, CIBINONG 16911, P.O. Box 25 CIBINONG INDONESIA PHONE (+62) 21 8765066; Fax (+62) 21 8765062 E-MAIL: reinwardtia@mail.lipi.go.id http://e-journal.biologi.lipi.go.id/index.php/reinwardtia Cover images: Catanthera keris Veldk. (1. Inflorescences; 2. Close up flower; 3. Flower bud), Medinilla squillula Veldk. (4. Habit; 5. Branches; 6. Fascicle of uniflorous Infructescences), Medinilla uninervis Veldk. (7. Habit. Note 1-nerved leaves; 8. infructescence; 9. Immature and mature fruits), Medinilla zoster Veldk. (10. Habit; 11. Inflorescences; 12. Flower). Photo credits: Bangun 223, Lowry & Phillipson 7287, Mahroji, Fabanyo & Soleman 69, Callmander, et al. 1067. 1 2 3 4 5 6 7 8 9 10 11 12 The Editors would like to thank all reviewers of volume 16(1): Agus Susatya - University of Bengkulu, Bengkulu, Indonesia Agus Sutanto - Indonesian Tropical Fruit Research Institute (ITFRI), West Sumatra, Indonesia Axel D. Poulsen - Royal Botanic Garden Edinburgh, Edinburgh, Scotland, UK Andrew Powling - School of Biological Sciences, University of Portsmouth, Portsmouth, UK Elham Sumarga - School of Life Sciences & Technology, Institut Teknologi Bandung, Bandung, Indonesia Meekiong Kallu - University Malaysia Sarawak, Samarahan, Sarawak, Malaysia Harry Wiriadinata - Herbarium Bogoriense, Indonesian Institute of Sciences, Bogor, Indonesia Ulrich Meve - Lehrstuhl für Pflanzensystematik, Universität Bayreuth, Bayreuth, Germany Mien A. Rifai - Akademi Ilmu Pengetahuan Indonesia (AIPI), Jakarta, Indonesia REINWARDTIA Vol 16 No 1, pp: 5 – 10 5 HOYA NARCISSIFLORA (APOCYNACEAE, ASCLEPIADOIDEAE), A NEW SPECIES FROM BORNEO Received October 13, 2016; accepted February 2, 2017 SRI RAHAYU Bogor Botanic Gardens, Center for Plant Conservation LIPI, Jln. Ir. H. Juanda 13 Bogor, 16122, Indonesia. Email: srirahayukrb@yahoo.com MICHELE RODDA The Herbarium, Singapore Botanic Gardens, 1 Cluny Road, 259569 Singapore. Email: rodda.michele@gmail.com ABSTRACT RAHAYU, S. & RODDA, M. 2017. Hoya narcissiflora (Apocynaceae, Asclepiadoideae), a new species from Borneo. Reinwardtia 16(1): 5 – 10. — A new species of Hoya from Borneo is described, namely Hoya narcissiflora S. Rahayu & Rodda. The species has thin, non-succulent leaves similar to those of species in the Hoya campanulata group and shallowly campanulate corolla. It is compared with all other Bornean Hoya species possessing campanulate corollas. Key words: Hoya campanulata, H. danumensis, H. jiewhoeana, H. sammannaniana, Indonesia, primary forest, West Kalimantan. ABSTRAK RAHAYU, S. & RODDA, M. 2017. Hoya narcissiflora (Apocynaceae, Asclepiadoideae), satu jenis baru dari Borneo. Reinwardtia 16(1): 5 – 10. — Satu jenis baru dari Borneo dideskripsikan di dalam makalah ini, yaitu Hoya narcissiflora S. Rahayu & Rodda. Jenis ini memiliki tipe daun tipis dan bukan sukulen, serta tipe bunga dengan mahkota berlekatan (campanulate), merupakan tipe yang dimiliki kelompok Hoya campanulata. Jenis ini dibandingkan secara morfologi dengan jenis-jenis Hoya bertipe “campanulata” yang terdapat di Borneo. INTRODUCTION Hoya R. Br. is the largest genus of Apocyna- ceae (Endress et al., 2014) and includes 350-450 mostly epiphytic climbers with a centre of diversi- ty in tropical Asia (Rodda, 2015). The recently published guidebook to Hoyas of Borneo by Lamb & Rodda (2016) despite not being a complete revi- sion was a first step towards a revision of Bornean Hoya. The checklist included in the book lists 72 Hoya species for Borneo, half of which endemic to the island. However, most of the information for the compilation of the book was obtained from collections gathered from Brunei, Sabah and Sara- wak, and to a much lesser extent from Kalimantan. In consequence, the diversity of Hoya species in Indonesian Borneo is incomplete due to the scarci- ty of recent collections. The only information on Hoya diversity of Central Kalimantan is given by Rahayu (2006), who listed just nine species col- lected during expeditions to just a small part of Central Kalimantan. Lamb et al. (2014) suggested that 60 to 70 Hoya species may occur in Sabah alone, and it is becoming apparent that the diversi- ty of Hoya of Borneo is expected to be comparable to or even exceeding that of the Philippines (Aurigue et al., 2013, 104 species) or of New Guinea (Forster, 1996, 74 species). Nonetheless new species have been described from West Kali- mantan such as Hoya undulata S. Rahayu & Rodda (Rahayu et al., 2015) and H. sammannaniana A.L. Lamb, Gavrus, Emoi & Gokusing (Lamb et al., 2014), also found in Sabah. Hoya species are rarely found blooming in the wild and cultivation of wild collected plants has been a successful way to identify the species (Kleijn & van Donkelaar, 2001; Lamb et al. 2014; Rintz, 1978; Rodda & Simonsson-Juhonewe, 2016). Most Hoya species are epiphytic climbers with fleshy to succulent leaves. A few species however have thinner non-succulent leaves and often campanulate or urceolate corollas and are adapted to more moist environments. These may be more difficult to keep alive in mixed collections in botanic gardens and need much more care to bloom. The first species with thin leaves that was described is H. campanulata Blume from Java (Blume, 1826). This species has not been collected in Borneo, but numerous other species in this group can be found on the island such as H. wallichii ( W i g h t ) C . M . B u r t o n, T y p e : S i n g a p o r e (Burton, 1996), H. danumensis Rodda & Nyhuus, Type: Sabah (Rodda & Nyhuus, 2009); – REINWARDTIA 6 [VOL.16 H. mappigera Rodda & Simonsson, Type: Peninsular Malaysia, Perak (Rodda & Simonsson- Juhonewe, 2012) and H. wongii Rodda, Simons- son & L. Wanntorp, Type: Brunai (Rodda et al., 2011) and H. sammannaniana which has deep bell shaped corollas, type locality Sabah (Lamb et al., 2014). Recently, we found a new thin leaved Hoya with shallowly campanulate flowers in West Kali- mantan. The specimen was firstly seen for sale as an unidentified species at the Flora Show in Jakar- ta in October 2014. Based on the shape and thick- ness of the leaves it looked similar to H. samman- naniana or also possibly to H. danumensis or H. campanulata. Pictures of the flowers were later uploaded on Facebook by Mr. Maskuran, and we realised that it represents a new species. Mr. Maskuran provided a live specimen collected from Sanggau, West Kalimantan that was cultivated at the Bogor Botanic Gardens. Pickled flowers were also sent to Bogor Botanic Gardens from the pri- vate collection of Melda Lazuardi in Jakarta, who obtained her plant from Mr. Maskuran. The mor- phological observation of the specimen was done in Bogor Botanic Gardens, while the observation of pollinia took place in the Singapore Botanic Gardens Herbarium. TAXONOMIC TREATMEANT Hoya narcissiflora S. Rahayu & Rodda spec. nov. Figs. 1 3. — Type: Indonesia, West Kaliman- tan, Sanggau, 100–300 m, on a slope close to a stream, primary forest “Hutan Adat”, Feb 2014 (cultivated at Bogor Botanic Gardens from vegeta- tive material collected in the wild by Mr. Masku- ran) Sri Rahayu JQ705 (Holotype BO, isotype KRB). Diagnosis. Similar to H. danum ensis as both taxa have elliptic to oblong thin laminas and ovoid corona lobes. It can be separated from H. danumensis on the shape of the corona lobes that are less than 1.5 times as long as broad in H. narcissiflora vs. ca. twice as long as broad in H. danumensis. Description. Epiphytic climber, shrubby when young, with white latex in all vegetative parts, glabrous. Stems slender, lignified when old, inter- nodes very variable in length, 0.5 – 10 cm long, 2.0 – 2.5 mm in diameter, green when young, grey -green when mature; Leaves petiolate; petiole, 0.5 – 1.0 cm × 1.5 – 2.0 mm in diameter, channelled above, light green; lamina elliptic to oblong, thin, 5 – 12 × 2 – 4 cm, base cuneate without colleters, apex acute or acuminate, discolorous with upper side fresh to dark green, lower side paler green, young leaves pale green, venation pinnate, sec- ondary veins 4 – 5 pairs. Inflorescence pseudo- umbellate, convex, 5 – 10 flowered; peduncle age- otropic, with a rachis turning positively geotropic, very short 4 – 6 × 1.5 – 2.0 mm in diameter, grey green, glabrous. Flowers weakly scented, produce visible nectar from the second day onwards, last- ing 4 – 5 days in cultivation; pedicel positively geotropic, ca. 2.5 cm × ca. 1 mm in diameter, white-pale green, glabrous. Calyx lobes free, ovate to triangular with a round tip, 1.0 – 1.2 × 0.8 – 1.0 mm wide, creamy white or light green, glabrous, basal colleters one in each calyx lobe sinus, trian- gular, 2.3 – 2.7 × 1.5 – 1.7 mm. Corolla very shal- lowly campanulate, almost round in outline, flat- tened and slightly campanulate at the centre under- neath the corona when in full bloom, white or very pale yellow; tube 10–14 mm in diameter, undulat- ing and with a depression underneath each corona lobe, visible as a small hump on the outside in between the calyx lobes, glabrous outside, pubescent inside only underneath the corona; lobes broadly triangular, 6 – 9 × 3.5 – 5 mm, folded in the centre, apex acute, glabrous. Corona staminal, erect, 6 – 7 mm in diameter, 5.0 – 5.5 mm high, white or yel- lowish white; lobes upright, when observed from above round to ovoid, 2.2 – 2.5 × 1.0 – 1.2 mm, 5.0 – 5.5 mm tall, outer process concave with an acute tip, inner process apiculate; skirt located at the base of each coronal lobe, 1/3 of the corona length, thin, rhomboid with short acuminate apex at the centre, white or yellowish white; A nthers with apical round membranaceous appendage just exceeding the style-head apex. Pollinia elliptic oblong, 500 – 550 × 100 – 150 µm, narrowing towards the base, apex round, sterile edge promi- nent along the outer edge of the pollinium; corpus- culum elliptic, 50 – 60 × 25 – 30 µm with an acute tip, caudicle almost rectangular, 90 – 100 × 20 – 25 µm, twisted at the base; concave, hyaline. Style -head 5 angled in cross section, style-head apex acute, 0.5 – 0.6 mm high, 1.4 – 1.5 mm broad at the base. Ovaries elliptic with narrower tip from the base, ca. 1.9 – 2 mm × ca. 0.7 mm at the widest area in the centre, light green, glabrous. Fruit and seed not seen. Distribution. Only known fr om the type locality in West Kalimantan, close to Sanggau. Habitat and ecology. Hoya narcissiflora has been observed in lowland primary forest at 100– – RAHAYU & RODDA: New Hoya from Borneo 2017] 7 Fig. 1. Hoya narcissiflora. A. Flower from above. B. Corolla with corona removed. C. Corolla and calyx, from underneath. D. Flower, side view. E, F. Corona, side view. G. Corona, from underneath. H. Corona, from above. I. Calyx and ovaries. J. Pollinarium. REINWARDTIA 6 [VOL.16 H. mappigera Rodda & Simonsson, Type: Peninsular Malaysia, Perak (Rodda & Simonsson- Juhonewe, 2012) and H. wongii Rodda, Simons- son & L. Wanntorp, Type: Brunai (Rodda et al., 2011) and H. sammannaniana which has deep bell shaped corollas, type locality Sabah (Lamb et al., 2014). Recently, we found a new thin leaved Hoya with shallowly campanulate flowers in West Kali- mantan. The specimen was firstly seen for sale as an unidentified species at the Flora Show in Jakar- ta in October 2014. Based on the shape and thick- ness of the leaves it looked similar to H. samman- naniana or also possibly to H. danumensis or H. campanulata. Pictures of the flowers were later uploaded on Facebook by Mr. Maskuran, and we realised that it represents a new species. Mr. Maskuran provided a live specimen collected from Sanggau, West Kalimantan that was cultivated at the Bogor Botanic Gardens. Pickled flowers were also sent to Bogor Botanic Gardens from the pri- vate collection of Melda Lazuardi in Jakarta, who obtained her plant from Mr. Maskuran. The mor- phological observation of the specimen was done in Bogor Botanic Gardens, while the observation of pollinia took place in the Singapore Botanic Gardens Herbarium. TAXONOMIC TREATMEANT Hoya narcissiflora S. Rahayu & Rodda spec. nov. Figs. 1 3. — Type: Indonesia, West Kaliman- tan, Sanggau, 100–300 m, on a slope close to a stream, primary forest “Hutan Adat”, Feb 2014 (cultivated at Bogor Botanic Gardens from vegeta- tive material collected in the wild by Mr. Masku- ran) Sri Rahayu JQ705 (Holotype BO, isotype KRB). Diagnosis. Similar to H. danum ensis as both taxa have elliptic to oblong thin laminas and ovoid corona lobes. It can be separated from H. danumensis on the shape of the corona lobes that are less than 1.5 times as long as broad in H. narcissiflora vs. ca. twice as long as broad in H. danumensis. Description. Epiphytic climber, shrubby when young, with white latex in all vegetative parts, glabrous. Stems slender, lignified when old, inter- nodes very variable in length, 0.5 – 10 cm long, 2.0 – 2.5 mm in diameter, green when young, grey -green when mature; Leaves petiolate; petiole, 0.5 – 1.0 cm × 1.5 – 2.0 mm in diameter, channelled above, light green; lamina elliptic to oblong, thin, 5 – 12 × 2 – 4 cm, base cuneate without colleters, apex acute or acuminate, discolorous with upper side fresh to dark green, lower side paler green, young leaves pale green, venation pinnate, sec- ondary veins 4 – 5 pairs. Inflorescence pseudo- umbellate, convex, 5 – 10 flowered; peduncle age- otropic, with a rachis turning positively geotropic, very short 4 – 6 × 1.5 – 2.0 mm in diameter, grey green, glabrous. Flowers weakly scented, produce visible nectar from the second day onwards, last- ing 4 – 5 days in cultivation; pedicel positively geotropic, ca. 2.5 cm × ca. 1 mm in diameter, white-pale green, glabrous. Calyx lobes free, ovate to triangular with a round tip, 1.0 – 1.2 × 0.8 – 1.0 mm wide, creamy white or light green, glabrous, basal colleters one in each calyx lobe sinus, trian- gular, 2.3 – 2.7 × 1.5 – 1.7 mm. Corolla very shal- lowly campanulate, almost round in outline, flat- tened and slightly campanulate at the centre under- neath the corona when in full bloom, white or very pale yellow; tube 10–14 mm in diameter, undulat- ing and with a depression underneath each corona lobe, visible as a small hump on the outside in between the calyx lobes, glabrous outside, pubescent inside only underneath the corona; lobes broadly triangular, 6 – 9 × 3.5 – 5 mm, folded in the centre, apex acute, glabrous. Corona staminal, erect, 6 – 7 mm in diameter, 5.0 – 5.5 mm high, white or yel- lowish white; lobes upright, when observed from above round to ovoid, 2.2 – 2.5 × 1.0 – 1.2 mm, 5.0 – 5.5 mm tall, outer process concave with an acute tip, inner process apiculate; skirt located at the base of each coronal lobe, 1/3 of the corona length, thin, rhomboid with short acuminate apex at the centre, white or yellowish white; A nthers with apical round membranaceous appendage just exceeding the style-head apex. Pollinia elliptic oblong, 500 – 550 × 100 – 150 µm, narrowing towards the base, apex round, sterile edge promi- nent along the outer edge of the pollinium; corpus- culum elliptic, 50 – 60 × 25 – 30 µm with an acute tip, caudicle almost rectangular, 90 – 100 × 20 – 25 µm, twisted at the base; concave, hyaline. Style -head 5 angled in cross section, style-head apex acute, 0.5 – 0.6 mm high, 1.4 – 1.5 mm broad at the base. Ovaries elliptic with narrower tip from the base, ca. 1.9 – 2 mm × ca. 0.7 mm at the widest area in the centre, light green, glabrous. Fruit and seed not seen. Distribution. Only known fr om the type locality in West Kalimantan, close to Sanggau. Habitat and ecology. Hoya narcissiflora has been observed in lowland primary forest at 100– – REINWARDTIA 8 [VOL.16 Fig. 2. Hoya narcissiflora. Inflorescence from a plant in cultivation. A. From above. B. From underneath. (Photos: Maskuran) Fig. 3. Hoya narcissiflora. Larger and smaller leaves. A. From above. B. From underneath. (Photos: Maskuran) RAHAYU & RODDA: New Hoya from Borneo 2017] 9 300 m above sea level on a slope near a small river. It was growing as an epiphyte on the main trunk of dipterocarp trees at about 1.5 m above ground, growing in deep shade (30% sunlight) and very high humidity (about 80%) (Maskuran, pers. comm.). Johansson (1975) categorised the various areas of the host plant occupied by epiphytes. The main stem of the host is indicated as the zone B. Different zones are correlated with the differential requirement for light, nutrients and water. According to Benzing (1990) some species are restricted to strongly illuminated sites, some to shady sites, while some avoid both strong light and deep shade and yet others have a wide range of tolerance. Occupying the B zone means that the species is adapted to moist shady habitats. In the wild the plants of H. narcissiflora were only found in deep shade. In cultivation however exposure to brighter light was necessary to trigger blooming (Sri Rahayu and Melda Lazuardi, pers. obs.). Etymology. The epithet r efer s to the r esem- blance of the flowers to species of Narcissus, both in color and in general shape. IUCN conservation assessment. This species is only known from a single locality in West Kali- mantan. The preliminary conservation status of H. narcissiflora is therefore Data Deficient (DD, IUCN 2014). Ex situ collections are present in Bogor Botanic Gardens (from type locality) and several private collectors in Indonesia as Mr. Maskuran has been distributing cuttings from his original collection among the Hoya growers under the com- munity Hoya Indonesia. Notes. Bor neo has numer ous species with thin leaves and campanulate or urceolate flowers. Hoya mappigera, H. omlorii (Livsh. & Meve) L. Wanntorp & Meve (Wanntorp & Meve, 2011), H. sammannaniana, H. wallichii and H. wongii can be separated from H. narcissiflora because they have single flowers or few-flowered inflores- cences. Hoya danumensis, H. devogelii Rodda & Simonsson (Rodda & Simonsson, 2011), H. gild- ingii Kloppenb. (Kloppenburg, 2002), H. jiewhoe- ana, H. nuttiana Rodda & Simonsson (Rodda & Simonsson-Juhonewe, 2013) and H. phyllura O. Schwartz (Schwartz, 1931) instead have convex umbelliform inflorescences with numerous flowers open concurrently. Hoya narcissiflora can be separated from H. devogelii, H. gildingii, H. jiewhoeana, H. nuttiana and H. phyllura because these species have a pubescent corolla (only sparsely pubescent in H. phyllura) while the corolla of H. narcissiflora is glabrous. It can be separated from H. danumensis on the shape of the corona lobes in top view are ca. twice as long as broad in H. danumensis and less than 1.5 times as long as broad in H. narcissi- flora. The corona lobes of H. narcissiflora are also taller and more erect than those of H. da- numensis that are instead flat and spreading. The corona of H. narcissiflora, with its tall and erect lobes is also similar to that of Hoya chewiorum A. L. Lamb, Gavrus, Emoi & Gokusing and H. jiewhoeana. The flowers of the three species can be easily separated based on the corolla that is shallowly campanulate and glabrous in H. narcis- siflora, reflexed and pubescent inside in H. chewi- orum and campanulate pubescent inside in H. jiewhoeana. ACKNOWLEDGEMENTS We would like to thanks to Mr. Maskuran and Ms. Melda Lazuardi who provided material and information of the new species for study and culti- vation in Bogor Botanic Gardens. We also thanks to Mr. Teguh (BBG) for assistant in pressing the materials. We would like to thank the curators of following herbaria BCU, BK, BKF, BM, BO, BRUN, FI, K, KEP, L, LAE, P, SAN, SAR, SNP, SING, UC and UPM, for allowing access and/or for providing high quality images of herbarium specimens. REFERENCES AURIGUE, F. B., SAHAGUN, J. R. & SUAREZ, W. M. 2013. Hoya cutis-porcelana (Apocynaceae): A new species from Samar and Biliran Islands, Philippines. J. Nat. Studies 12 (1): 12–17. BENZING, D. H. 1990. Vascular epiphytes: gen- eral biology and related biota. Cambridge Univ. Press, Cambridge. BLUME, C. L. 1826. Hoya. In: BLUME, C. L. Bijdr. Fl. Ned. Ind. 16: 1062–1065. Batavia: Ter Lands Drukkerij. BURTON, C. M. 1996. A tentative alternative arrangement of Hoya sections. Hoyan. 18(1:2): 2–6. ENDRESS, M. E., LIEDE-SCHUMANN, S. & MEVE, U. 2014. An updated classification for Apocynaceae. Phytotaxa 159(3): 175–194. FORSTER, P. I. 1996. A checklist of the Asclepi- adaceae of Papua. Science in New Guinea 22 (1): 15–22. REINWARDTIA 8 [VOL.16 Fig. 2. Hoya narcissiflora. Inflorescence from a plant in cultivation. A. From above. B. From underneath. (Photos: Maskuran) Fig. 3. Hoya narcissiflora. Larger and smaller leaves. A. From above. B. From underneath. (Photos: Maskuran) REINWARDTIA 10 [VOL.16 JOHANSSON, D. R. 1975. Ecology of epiphytic orchids in West African rain forests. A merican Orchid Society Bulletin 44: 125–136. KLEIJN, D. & van DONKELAAR, R. 2001. Notes on the taxonomy and ecology of the ge- nus Hoya (Asclepiadaceae) in Central Sulawesi. Blumea 46: 457–483. KLOPPENBURG, R. D. 2002. Correction. Frater- na 15(1): 10. IUCN. 2014. Guidelines for Using the IUCN Red List Categories and Criteria. Version 10.1. Pre- pared by the Standards and Petitions Subcom- mittee.[Downloaded on 20 January 2014] Available from http://www.iucnredlist.org/ documents/RedListGuidelines.pdf LAMB, A.L., GAVRUS, A., EMOI, B. & GOKUSING, L. 2014. The Hoyas of Sabah, a commentary with seven new species and a new subspecies. Sandakania 19: 1–89. LAMB, A.L. & RODDA, M. 2016. A Guide to Hoyas of Borneo. Natural History Publications Borneo, Kota Kinabalu, 204 pp. RAHAYU, S. 2006. Species diversity of Hoya in Bukit Batikap, Muller Mountain, Central Kali- mantan. [In Bahasa with English summary]. Keanekaragaman jenis Hoya di Hutan Lindung Bukit Batikap, Pegunungan Muller, Kalimantan Tengah. Biodiversitas 7(2): 139–142. RAHAYU, S., MEVE, U. & RODDA, M. 2015. Hoya undulata (Apocynaceae, Asclepiadoide- ae), a new myrmecophytic species from Bor- neo, and typification of H. darwinii. Gardens’ Bulletin Singapore 67(1): 85–94. doi: 10.3850/ S2382581215000101 RINTZ, R. E. 1978. The peninsular Malaysian species of Hoya (Asclepiadaceae). Malay. Nat. J. 30: 467–522. RODDA, M. 2015. Two new species of Hoya R. Br. (Apocynaceae, Asclepiadoideae) from Borneo. PhytoKeys 53: 83–93. RODDA, M. & NYHUUS, T. 2009. Hoya da- numensis, a new species of Hoya (Apocynaceae, Asclepiadoideae) from Borneo. W ebbia 64(2): 163–167. RODDA, M. & SIMONSSON, N. 2011. Hoya devogelii (Apocynaceae: Asclepiadoideae), a new species from Sarawak, Borneo. W ebbia 66 (1): 33–38. RODDA, M. & SIMONSSON-JUHONEWE, N. 2012. Hoya mappigera (Apocynaceae, Asclepi- adoideae), a new campanulate flowered species from Peninsular Malaysia and southern Thai- land. Fed. Repert. 122: 1–7. RODDA, M. & SIMONSSON-JUHONEWE, N. 2013. Hoya nuttiana (Apocynaceae: Asclepia- doideae), a new species from Sarawak, Malay- sian Borneo. Phytotaxa 140(1): 56–60. RODDA, M. & SIMONSSON-JUHONEWE, N. 2016. Hoya isabelchanae Rodda & Simonsson, a new, showy species of Hoya R. Br. (Apocynaceae, Asclepiadoideae) with pome- granate red flowers from Sulawesi, Indonesia. PhytoKeys 68: 45–50. RODDA, M., SIMONSSON, N. & WANNTORP, L. 2011. Hoya wongii (Apocynaceae, Asclepia- doideae): a new campanulate flowered species from Brunei (Borneo). Blumea 56: 205–208. SCHWARTZ, O. 1931. Hoya In: IRMSCHER, I. (Ed.). Beitrage zur kenntnis der flora von Borneo. Mitt. Inst. Allg. Bot. Hamburg 7: 261– 262. WANNTORP, L. & MEVE, U. 2011. New combi- nations in Hoya for the species of Clemensiella (Marsdenieae, Apocynaceae). W illdenowia 41 (1): 97–99. INSTRUCTION TO AUTHORS Scope. R einwardtia is a scientific ir r egular jour nal on plant taxonomy, plant ecology and ethnobotany published in June and December. Manuscript intended for a publication should be written in English. Titles. Titles should be br ief, infor mative and followed by author ’s name and mailing address in one- paragraphed. Abstract. English abstr act followed by Indonesian abstr act of not mor e than 250 wor ds. Keywor ds should be given below each abstract. Manuscript. Manuscr ipt is or iginal paper and r epr esent an ar ticle which has not been published in any other journal or proceedings. The manuscript of no more than 36 pages by using Times New Roman 11, MS Word for Windows of A4 with double spacing, submitted to the editor through . New paragraph should be indented in by 5 characters. For the style of presentation, authors should follow the latest issue of Reinwardtia very closely. Author(s) should send the preferred running title of the article submitted. Every manuscript will be sent to two blind reviewers. Identification key. Taxonomic identification key should be pr epar ed using the aligned couplet type. Nomenclature. Str ict adher ence to the Inter national Code of Nomenclatur e is obser ved, so that taxonomic and nomenclatural novelties should be clearly shown. English description for new taxon proposed should be provided and the herbaria where the type specimens area deposited should be presented. Name of taxon in taxonomic treatment should be presented in the long form that is name of taxon, author’s name, year of publication, abbreviated journal or book title, volume, number and page. Map/line drawing illustration/photograph. Map, line dr awing illustr ation, or photogr aph pr efer ably should be prepared in landscape presentation to occupy two columns. Illustration must be submitted as original art accompanying, but separated from the manuscript. The illustration should be saved in JPG or GIF format at least 350 pixels. Legends or illustration must be submitted separately at the end of the manuscript. References. Bibliogr aphy, list of liter atur e cited or r efer ences follow the Har var d system as the following examples. Journal : KRAENZLIN, F. 1913. Cyrtandraceae novae Philippinenses I. Philipp. J. Sci. 8: 163–179. MAYER, V., MOLLER, M., PERRET, M. & WEBER, A. 2003. Phylogenetic position and generic differentiation of Epithemateae (Gesneriaceae) inferred from plastid DNA sequence data. American J. Bot. 90: 321–329. Proceedings :TEMU, S. T. 1995. Peranan tumbuhan dan ternak dalam upacara adat “Djoka Dju” pada suku Lio, Ende, Flores, Nusa Tenggara Timur. In: NASUTION, E. (Ed.). Prosiding Seminar dan Lokakarya Nasional Etnobotani II. LIPI & Perpustakaan Nasional: 263–268. (In Indonesian). SIMBOLON, H. & MIRMANTO, E. 2000. Checklist of plant species in the peat swamp forests of Central Kalimantan, Indonesia. In: IWAKUMA, T. et al. (Eds.) Proceedings of the International Symposium on: Tropical Peatlands. Pp.179-190. Book : RIDLEY, H. N. 1923. Flora of the Malay Peninsula 2. L. Reeve & Co. Ltd, London. Part of Book : BENTHAM, G. 1876. Gesneriaceae. In: BENTHAM, G. & HOOKER, J. D. Genera plantarum 2. Lovell Reeve & Co., London. Pp. 990–1025. Thesis : BAIRD, L. 2002. A Grammar of Kéo: An Austronesian language of East Nusantara. Australian National University, Canberra. [PhD. Thesis]. Website : http://www.nationaalherbarium.nl/fmcollectors/k/KostermansAJGH.htm). Accessed 15 February 2012. http://www.nationaalherbarium.nl/fmcollectors/k/KostermansAJGH.htm REINWARDTIA Author Agreement Form Title of article : Name of Author(s) : I/We hereby declare that:  My/Our manuscript was based on my/our original work.  It was not published or submitted to other journal for publication.  I/we agree to publish my/our manuscript and the copyright of this article is owned by Reinwardtia.  We have obtained written permission from copyright owners for any excerpts from copyrighted works that are included and have credited the sources in our article. Author signature (s) Date ___________________________________________________________________________________________ Name Reinwardtia Published by Herbarium Bogoriense, Botany Division, Research Center for Biology, Indonesian Institute of Sciences Address: Jln. Raya Jakarta-Bogor Km. 46 Cibinong 16911, P.O. Box 25 Cibinong Telp. (+ 62) 21 8765066; Fax (+62) 21 8765062 E-mail: reinwardtia@mail.lipi.go.id REINWARDTIA Vol. 16. No. 1. 2017 CONTENTS Page DINI PUSPITANINGRUM, WENDY A. MUSTAQIM & MARLINA ARDIYANI. A new record of Etlingera pauciflora (Zingiberaceae) in Java, Indonesia ...…………………………………..…………………..…….…...………….…………. 1 SRI RAHAYU & MICHELE RODDA. Hoya narcissiflora (Apocynaceae, Asclepiadoideae), a new species from Borneo ……………………………………………………………………………………….…………………………. 5 IYAN ROBIANSYAH. Predicting habitat distribution of endemic and critically endangered Dipterocarpus littoralis in Nusakambangan, Indonesia ……………………………………………….…..……………………………….………. 11 LULUT DWI SULISTYANINGSIH. A newly described and recorded infraspecific taxa of Musa borneensis Becc. (Musaceae) from Sulawesi, Indonesia ……………………………………………...…....…………….………………..... 19 JAN-FIRTS VELDKAMP & ABDULROKHMAN KARTONEGORO. New species of Catanthera and Medinilla (Melastomataceae) from Halmahera, Indonesia and a new name for a Medinilla from Madagascar…………………………………...…...……... 25 PURWANINGSIH, RUDDY POLOSAKAN, RAZALI YUSUF & KUSWATA KARTAWINATA. Phytosociological study of the montane forest on the south slope of Mt. Wilis, East Java, Indonesia………………………..…………………………….…. 31 IAN M. TURNER. A new combination for subspecies of Radermachera quadripinnata (Bignoniaceae) ........................ 47 Reinwardtia is a LIPI accredited Journal (792/AU3/P2MI-LIPI/04/2016) http://e-journal.biologi.lipi.go.id/index.php/reinwardtia Herbarium Bogoriense Botany Division Research Center for Biology – Indonesian Institute of Sciences Cibinong Science Center Jln. Raya Jakarta − Bogor, Km 46 Cibinong 16911, P.O. Box 25 Cibinong Indonesia front cover, cover dalam, reviewer Reinwardtia 16(1)_1-1 REINWARDTIA 2017 Jun Full_2-2 REINWARDTIA 2017 Jun Full_3-3 REINWARDTIA 2017 Jun Full_4-4 REINWARDTIA 2017 Jun Full_9-9 REINWARDTIA 2017 Jun Full_10-10 REINWARDTIA 2017 Jun Full_11-11 REINWARDTIA 2017 Jun Full_12-12 REINWARDTIA 2017 Jun Full_13-13 REINWARDTIA 2017 Jun Full_14-14 8. Daftar Isi Reinwardtia 16(1)