Tên Khoa học: Bulbophyllum glabrichelia Aver.
Tên tiếng Anh:
Tên tiếng Việt:
Tên khác:

Short creeping or clustering trunk or branch epiphyte. Rhizome rigid, semi-woody, (2)2.5– 3(3.5) mm in diam., with close pseudobulbs touching each other. Pseudobulbs dull greenish, depressed-conical, flattened, (0.8)1–1.5(2) cm in diam., (0.8)1–1.2(1.5) cm tall. Leaf obscurely petiolate; leaf blade rather thick or coriaceous, narrowly oblanceolate to oblanceolate, (8)10–15(18) cm long, (0.6)0.8–1.4(1.6) cm wide, tapering into terete, shallowly grooved petiole-like base, 1.5–2.5 cm long, at apex obtuse, rounded or obscurely bilobed. Inflorescence erect or somewhat patent, long stalked, subdense, many flowered secund raceme to 30(35) cm tall; peduncle (12)14–18(20) cm long, straight, light greenish, with few small sterile papyraceous scales at the base, naked above; rachis (6)8–12(14) cm long, glabrous, somewhat glaucous, straight or slightly curved, with almost all flowers opening simultaneously. Floral bracts light yellowish-brown, scarious or papyraceous, narrowly triangular, acuminate, (1.5)1.8–2.2(2.5) mm long, (0.6)0.8-1(1.2) mm wide. Pedicel and ovary (4.5)5-6(8) mm long, ovary obconical, (0.6)0.8-1(1.2) mm in diam. near flower base. Flowers spirally arranged, nodding, turned on one side, not widely opening, 0.8-1 cm across. Sepals white or light yellowish, heavily spotted and striped with blackish-purple to almost entirely black-purple, spreading, narrowly triangular-ovate, (5.5)6-7(7.5) mm long, lateral sepals (2.6)2.8-3.2(3.4) mm wide, median sepal twice narrower, all sepals obtuse, sometimes very shortly apiculate, dorsally glabrous, adaxially densely pubescent throughout with long hairs. Petals almost black, obpyriform spatulate, (1.2)1.4-1.8(2) mm long, (0.6)0.8-1(1.2) mm wide, attenuate at the base, broadening and thickening to the triangular, obtuse apex, pubescent throughout and long ciliate along margin. Lip white or greenish-white, in apical half dull black-purple, fleshy, narrowly oblong obovate, (5)5.5-6(6.5) mm long, 2-2.2(2.4) mm wide, recurved near the base, when fresh with broad shallow groove, adaxially rather flattened, irregularly rugose, without keels or ridges, entirely glabrous or finely shortly hairy near the base, rounded at apex, when dry with prominent branching longitudinal veins, at the base with 2 down directed, narrowly triangular acute dents. Column white, shortly cylindric, 1-1.2 mm tall, with little protruding stigma and small triangular, acute stelidia; operculum light yellowish, hemispheric, 0.5-0.6 mm in diam. Etymology. Species epithet refers entirely glabrous lip.

Habitat, phenology and conservation status.

Short creeping to clustering trunk epiphyte. Primary and secondary broad-leaved evergreen submontane forests on rocky solid marble-like highly eroded limestone, particularly on mossy trees on mountain tops. 950–1450 m. Fl. March – May. Locally common.

Tentatively estimated

IUCN Red List status - DD.

Distribution.

 Laos: Houaphan (Hem district, Na Puok village, Pu Tham Nhon Mountain)

Vietnam: Dien Bien (Dien Bien and Tua Chua districts).