摘 要 ：报道了中国兰科植物1新记录种，即苏瓣石豆兰(Bulbophyllum dayanum Rchb. f.)，本种的花序具2~5朵花，萼片和花瓣的边缘被流苏状丝质毛，可与该组的其他种相区别。将Dendrobium menglaensis X. H. Jin & H. Li归并为杓唇扁石斛(D. chrysocrepis Parish & Rchb. f. ex Hook. f.)的新异名，该种的花单生于压扁状的茎上，唇瓣勺状，与其近缘种易于区别。
Abstract:A newly recorded species of Orchidaceae from China, Bulbophyllum dayanum Rchb. f. is reported. It is distinguished from the others of section Sestochilos (Breda) Benth. & Hook. f. by its inflorescence with 2~5 flowers, sepals and petals with ciliate fringe of silky hairs at edges. Dendrobium menglaense X. H. Jin & H. Li is reduced to D. chrysocrepis Parish & Rchb. f. ex Hook. f. as a synonym, and characterized by solitary flowers with spoon-like lip which are borne on the flattened stem. Images and descriptions of the two species are provided.