December 2014 The Journal of Japanese Botany Vol. 89 No. 6 409

J. Jpn. Bot. 89: 409–411 (2014)

a,b,c b,c b Sanjeev Kumal Rai , Jyoti Prasad Gajurel , Krishna Kumar Shrestha , c d, Christoph Scheidegger and Lokesh Ratna Shakya *: Risleya (), a New Record for Flora of Nepal aDepartment of Resources, Ministry of Forests and Soil Conservation, Government of Nepal, Kathmandu, NEPAL; bCentral Department of Botany, Tribhuvan University, Kirtipur, Kathmandu, NEPAL; cSwiss Federal Institute for Forest, Snow and Landscape Research (WSL), Zurich, SWITZERLAND; dDepartment of Botany, Amrit Science Campus, Tribhuvan University, Thamel, Kathmandu, NEPAL *Corresponding author: [email protected]

Summary: Risleya King & Pantling is reported for The species can readily be identified from its the Flora of Nepal as a new record of the in mycotrophic habit and deep blackish-purple Orchidaceae. flowers. This is a new record for Nepal, not only for the species, but also for the genus. The genus Risleya King & Pantling is a monotypic genus described from (King Risleya atropurpurea King & Pantling in and Pantling 1898). Risleya atropurpurea King Ann. Roy. Bot. Gard. (Calcutta) 8: 247, t. 328 & Pantling is recorded from Sikkim, China, (1898); Pearce & Cribb, Orchids of : 235 and (Pearce and Cribb 2002), but (2002); Chen, Gale & Cribb in Wu & Raven, the genus has not been recorded from Nepal Fl. China 25: 245 (2009); Zang in Wu & Raven, (Hara et al. 1978, Banerji and Pradhan 1984, Fl. China Illust. 25: t. 320 f. 1 & 2 (2010). Type: Press et al. 2000, Rajbhandari and Dahal 2004, . Sikkim Himalaya, 13,000 ft., 1896, R. 2010, Rokaya et al. 2013). It is distributed from Pantling 451 (CAL, GH). [Fig. 1] 2900–3700 m from SW Sichuan, SE Xizang, 6–22 cm tall; rhizome pubescent. NW Yunnan and at 3500 to 4500 m from Bhutan Stem glabrous, dark purple, with basal sheaths; and India (Sikkim) (Chen et al. 2009, Pearce et sheaths 2, tubular. Inflorescence rachis 4–7 cm, al. 2002). densely flowered; floral bracts lanceolate, 1 mm. During our study of species diversity in Flowers 1–2 mm across, blackish-purple; pedicel forests (Scheidegger et al. 2010), a mycotrophic and ovary 1–1.5 mm, twisted. Sepals spreading, orchid species was recorded from a locality oblong, obtuse, 1.5 × 0.5 mm. Petals lanceolate, nearby Sarkaripati, Solukhumbu district at 0.8 × 0.4 mm. Lip adnate to column at base, an altitude of 3400 m. The orchid was found broadly ovate, concave, slightly crenulate at on the ground covered with moss and litter. base, 1.4–1.6 × 1.2 mm. Column 0.4 mm. Fruit The dominant tree species of the forest were ovoid, 3 × 2 mm. Rhododendron arboreum and Abies spectabilis. Distribution: E. Nepal, India (Sikkim), Other associated species were Rubus nepalensis, Bhutan, China, Myanmar. Pleione praecox, Dichrocephala integrifolia, Flowering: June. Gaultheria nummularioides, etc. The ground Altitude: 3400 m. was humus rich and moist at the time of Specimens examined: E NEPAL. Sagar- collection of the specimen. matha zone, Solukhumbu district, Taksindu to On critical examination, it is identified Sarkaripati, 3400 m, 27 June 2012, S. K. Rai, J. as Risleya atropurpurea King & Pantling. P. Gajurel, S. Devkota, Bibas Rai & Bhim Rai 410 植物研究雑誌 第 89 巻 第 6 号 2014 年 12 月

Fig. 1. Type specimen of Risleya atropurpurea King Fig. 2. Risleya atropurpurea King & Pantling (E NEPAL. & Pantling (INDIA. Sikkim Himalaya, 13,000 ft., Sagarmatha zone, Solukhumbu district, Taksindu to 1896, R. Pantling 451, GH; from Harvard University Sarkaripati, 27 June 2012, S. K. Rai & al. 19446, Herbaria Database). KATH005122).

19446 (KATH005122, TUCH; Figs. 2–3). References Banerji M. L. and Pradhan P. 1984. The Orchids of Nepal We are grateful to the CDB-WSL Project Himalaya. J. Cramer, Vanduz. Chen X. Q., Gale S. W. and Cribb P. J. 2009. Risleya King and the Swiss National Science Foundation & Pantling. In: Wu Z.-Y and Raven P. H. (eds.), Flora (Grant JRP IZ70Z0_131338/1 to Christoph of China 25: 245. Science Press, Beijing and Missouri Scheidegger), Central Department of Botany, Botanical Garden Press, St. Louis. Tribhuvan University, Nepal for providing Hara H., Stern W. T. and Williams L. H. J. (eds.) 1978. An the fund and logistics to the field trip. Thanks Enumeration of the Flowering Plants of Nepal, Vol. 1. British Museum (Natural History), London. are also due to Dr. Michael Nobis and Mr. King G. and Pantling R. 1898. The Orchids of Sikkim- Shiva Devkota of WSL and Bern University, Himalaya. Ann. Roy. Bot. Gard. (Calcutta) 8: 246–247, Switzerland, Dr. Khem Raj Bhattarai, Chief, t. 328. National Herbarium and Plant Laboratories, Pearce N. and Cribb P. 2002. The Orchids of Bhutan, Vol. 3(3). Royal Botanic Garden, Edinburgh and Royal Godavari, Nepal (KATH), and the staff of Government of Bhutan, Thimphu. KATH and Wilderplaces Treks, Kathmandu, for Press J. R., Shrestha K. K. and Sutton D. A. 2000. their cooperation. Annotated Checklist of the Flowering Plants of Nepal. The Natural History Museum, London. December 2014 The Journal of Japanese Botany Vol. 89 No. 6 411

Fig. 3. Risleya atropurpurea King & Pantling. A. Habit. B. Close-up view. C. Fruiting stage.

Rajbhandari K. R. and Dahal S. 2004. Orchids of Nepal: a Rokaya M. B., Raskoti B. B., Timsina B. and Münzbergová Checklist. Botanica Orientalis 4: 89–106. Z. 2013. An annonated checklist of the orchids of Rajbhandari K. R. and Dahal S. 2010. Orchidaceae. In: Nepal. Nord. J. Bot. 31: 511–550. Rajbhandari K. R. and Baral S. R. (eds.), Catalogue Scheidegger C., Nobis M. and Shrestha K. K. 2010. of Nepalese Flowering Plants I. Gymnosperms and Biodiversity and livelihood in land-use gradient in . Department of Plant Resources, an era of climate change – outline of a Nepal-Swiss Kathmandu. Research Project. Botanica Orientalis 7: 7–17.

S. K. Raia,b,c， J. P. Gajurelb,c，K. K. Shresthab，C. c d Scheidegger ，L. R. Shakya ：ネパール新産の Risleya 属（ラン科） ネパールからラン科の Risleya atropurpurea King & （a ネパール・植物資源局， Pantling を初めて報告した．これは属としても初めて b ネパール・Tribhuvan University, の報告となる．本種はこれまでシッキム，ブータン，中 Central Department of Botany， 国，ミャンマーに知られていたが，今回，ネパール東部 c スイス・Swiss Federal Institute for Forest, の Sagarmatha zone, Solukhumbu district の 3400 m の Snow and Landscape Research， 地点で確認された．生育地はコケと落ち葉に被われた地 d ネパール・Tribhuvan University, Department of Botany） 表であった．