柄叶石豆兰 bing ye shi dou lan

Bulbophyllum ebulbum King & Pantling; B. spathaceum Rolfe.

Rhizome creeping, 4-5 mm in diam., rooting at nodes of rhizome. Pseudobulb minute. Leaves arising from nodes of rhizome, 2-11 cm apart from each other. Petiole 4-8 cm; leaf blade oblong, 8-24 × 3-3.2 cm, fleshy, apex obtuse and retuse. Scape arising from base of pseudobulb, ascending, to 22 cm, with 2 or 3 sheaths at base; raceme 8-10 cm, densely with many small flowers; floral bracts narrowly lanceolate, ca. 3.5 mm. Pedicel and ovary 2.5-4 mm. Flowers pale yellow, thickly textured. Dorsal sepal oblong, 4.5-5 × 1.7-2 mm, 3-veined, entire, acute to acuminate; lateral sepals falcate-lanceolate, 5.2-6 × 2-2.6 mm, 3-veined, apex acute to acuminate. Petals elliptic, 2.5-3 × 1-1.1 mm, 1-veined, entire, obtuse; lip recurved, lanceolate, 3.3-4 × ca. 2 mm, 3-veined, slightly conduplicate toward base, apex obtuse. Column 1-1.5 mm; foot ca. 2 mm, slightly curved, adaxial base with a callus; stelidia erect, subtriangular, very short; anther cap finely papillate. Fl. Aug-Sep. 2n = 38.

Tree trunks in broad-leaved forests; ca. 1000 m. SE Yunnan [India, Indonesia, Laos, Malaysia, Myanmar, ?New Guinea, Philippines, Thailand, Vietnam; ?Pacific islands].