独龙江石豆兰 du long jiang shi dou lan

Rhizome patent to pendulous, with roots creeping alongside it toward base. Pseudobulbs close, cylindric, 1.5-2 × 0.5-0.8 cm, with a terminal leaf. Leaves subsessile; blade lanceolate, ca. 35 × 9-10 mm, apex acute. Scape from base of pseudobulb or node of rhizome, very short; peduncle ca. 5 mm; raceme dense with 10-15 small flowers, and 2 or 3 scalelike sheaths at base; floral bracts membranous, longer than pedicel and ovary, 7-8 mm, apex acute. Flowers pale yellow. Sepals free; dorsal sepal linear, 12-14 × ca. 1 mm, apex caudate; lateral sepals obliquely linear, 21-23 × ca. 2 mm, base adnate to column foot forming a mentum, apex caudate. Petals oblong, 1.9-2.1 × 1.3-1.5 mm, membranous, margins entire, apex acuminate; lip hooked-recurved, 2-2.2 × 0.9-1 mm, fleshy, base connected to end of column foot by a mobile joint, margins ciliate, apex obtuse; disk with 2 keels. Column ca. 2.5 mm; foot ca. 2 mm; stelidia narrowly triangular, ca. 2 mm. Fl. Oct-Nov.

● Branches and tree trunks in forests. NW Yunnan (Dulong Jiang).