Bulbophyllum khasyanum Griffith, Not. Pl. Asiat. 3: 284. 1851.卷苞石豆兰 juan bao shi dou lan

Bulbophyllum cylindraceum Lindley var. khasyanum (Griffith) J. D. Hooker.

Rhizome creeping, stout, 4-5 mm in diam. Pseudobulbs 4-6 mm apart from each other, ovoid-subglobose, very small, 3-5 mm, 3-4 mm in diam., with a terminal leaf. Petiole 3-4 cm; leaf blade elliptic-oblong or suboblong, 12-20 × 3-4 cm, apex obtuse. Scape from base of pseudobulb, 15-25 cm; raceme nodding, 5.5-6 cm, densely many flowered, with several involucres at base; involucres scale-shaped, ca. 8 × 2 mm, apex aristate; floral bracts lanceolate, ca. 7 mm, much longer than pedicel and ovary, apex curled-aristate. Flowers dark purple, lip even darker. Dorsal sepal ovate, ca. 5 × 2 mm; lateral sepals obliquely ovate, ca. 5 × 3 mm, abaxially slightly scaly, their lower edges connate to each other. Petals lanceolate, ca. 4 × 1.5 mm, apex long acuminate; lip ligulate, fleshy, grooved at base, adaxially with 3 keels and densely papillate. Column short, with a short but distinct foot. Fl. Nov.

About 2000 m. C Yunnan [Bhutan, NE India, Malaysia, Thailand, Vietnam].