尖叶石豆兰 jian ye shi dou lan

Bulbophyllum densiflorum Rolfe.

Rhizome stout, ca. 3 mm in diam., rooting from base of pseudobulbs. Pseudobulbs close, ovoid, 1-1.5 in diam., with 2 leaves at apex. Leaves deciduous at anthesis; petiole 5-10 mm; leaf blade oblong, 12-15 × 2.7-4 cm, leathery, base contracted into petiole, apex acute. Scape from base of pseudobulb, ca. 8 cm; panicle nodding, 2-3 cm, densely many flowered; peduncle ca. 1.2 mm in diam., with 3 or 4 sheaths; floral bracts narrowly lanceolate, 3-4 mm, apex acuminate. Pedicel and ovary 2-3 mm. Flowers yellow, not widely opening, thickly textured. Sepals similar, ovate-oblong, ca. 6 × 3 mm, apex obtuse; dorsal sepal concave; lateral sepals with lower edges connate to each other, base ca. 1/2 width adnate to column foot, apex hooded. Petals lanceolate, ca. 3.5 × 1.5 mm, entire, acute; lip recurved, ± conduplicate, ligulate, ca. 3 × 1.3 mm, fleshy, entire, obtuse. Column ca. 2 mm; foot ca. 2 mm, with free part ca. 1 mm; stelidia deltoid, ca. 1 mm; anther cap finely papillate margined. Fl. Jul. 2n = 38.

Rocks in mixed forests; 2100-2200 m. S Xizang [Bhutan, NE India, Nepal, Thailand].