斯勒卷瓣兰，中国云南南部兰科一新种

Bulbophyllum dresslerianum (Malaxideae: Orchidaceae), a New Species from Southern Yunnan, China

摘要:

描述并绘制了云南南部兰科石豆兰属一新种：斯勒卷瓣兰（Bulbophyllum dresslerianum Z.D.Han&H.Wang）。该新种属于双叶卷瓣兰组（section Tripudianthes Seidenf.），在形态上与该组的4种，即狄氏卷瓣兰（B.dickasonii）、堪布里石豆兰（B.kanburiense）、皱掌卷瓣兰（B.rugosisepalum）和拟双叶卷瓣兰（B.tripudians）近似，主要区别在于该种唇瓣前缘具囊泡，侧面及腹面被稀疏的短腺毛；侧萼片棕黄色，表面光滑。编制了斯勒卷瓣兰及其近缘种的检索表。目前，该种仅在云南南部墨江县发现一个居群，濒危状况有待评估。

Abstract:

Bulbophyllum dresslerianum Z. D. Han & H. Wang (Orchidaceae), a new species from southern Yunnan, China, is described and illustrated. The new species belongs to section Tripudianthes Seidenf., sharing some vegetative and floral traits with B. dickasonii, B. kanburiense, B. rugosisepalum and B. tripudians, but differs on the basis of a suite of floral characters. Globular papillae decorate the lip epichile with the abaxial side and margins bearing sparse short glandular hairs. In addition, its lateral sepals are brownish-yellow and glabrous. A key to B. dresslerianum and its related species is provided. Currently, this species is only found in one population, its conservation status requires further assessment.