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SPECIES

Scientific name: Bulbophyllum nigripetalum Rolfe
English name:
Vietnamese name:
Other name:

DESCRIPTION

Creeping epiphytic herb with rhizome (3)4-8(12) cm long, (1.5)2-2.3(3) mm in diam., pseudobulbs usually dense touching each other. Pseudobulbs ovoid or subglobular, shortly attenuate at apex, (0.5)0.6-1.2(1.4) cm tall and wide. Leaves shortly petiolate; petiole terete, (4)5-12(15) mm long, grooved adaxially; leaf blade oblong elliptic, (5)6-14(16) cm long, (0.6)8-12(16) mm wide, obtuse. Inflorescence glabrous, erect, lax, many-flowered secund raceme, (16)20 - 50(60) cm long, glabrous; peduncle (10)15-25(30) cm long, with 4-6 sterile, narrowly ovate bracts to 1 cm long; rachis (5)6-18(25) cm long. Floral bracts narrowly triangular, (1.2)1.5-2(2.5)mm long, 0.6-0.8 mm wide, acute. Flowers not widely opening, opening few in one tome. Pedicel and ovary glabrous, (3)3.5-4(4.5) mm long. Sepals (3.2)3.4-3.6(4) mm long, obtuse, ciliate along margin and pubescent adaxially, median sepal narrowly ovate, (0.9)1-1.2(1.4) mm wide, lateral sepals rectangular broadly ovate, (2)2.2-2.4(2.5) mm wide. Petals (1.4)1.5-1.6(1.8) mm long, 0.5-0.6 mm wide, spatulate, more or less gradually broadening from narrow base to obovate apical part, obtuse, densely hairy at apex. Lip recurved, obovoid, (2.5)2.6-2.8(3.2) long, (0.9)1-1.2(1.3) mm wide, rounded at apex, finely ciliate or velutinous, grooved in basal part. Column (0.8)1-1.2(1.3) mm long and wide, stigma protruding, with tooth slightly below; stelidia triangular, (0.3)0.4(0.5) mm long, acute; anther helmet shaped, 0.5-0.6 mm in diam., densely papillose.

Habitat, phenology and conservation status.

Short creeping or clustering branch epiphyte. Primary broad-leaved evergreen submontane forests. 1000–1800 m. Fl. November – December.

Very rare.

Tentatively estimated

IUCN Red List status - DD.

Distribution.

Laos: Houaphan (Hem district, Na Puok village, Pu Tham Nhon Mountain) and Louang Namtha (sine loc.) provinces,

Vietnam: Lam Dong province (Bidoup Mountains).

S. China (Yunnan), N. Thailand. 

PHOTOS

Bulbophyllum nigripetalum and Bulbophyllum parviflorum on Taiwania 62(1).jpg at www.BotanyVN.com

Photo 1. Bulbophyllum nigripetalum and Bulbophyllum parviflorum on Taiwania 62(1).jpg

 

Bulbophyllum nigripetalum on Taiwania 62(1).jpg at www.BotanyVN.com

Photo 2. Bulbophyllum nigripetalum on Taiwania 62(1).jpg

 

SCIENTIFIC CLASSIFICATION
Kingdom: Plantae
Division: Magnoliophyta
Class: Liliopsida
Order: Orchidales
Familia: Orchidaceae
Genus: Bulbophyllum

PARAMETERS

BVN - BotanyVN - Botany Research and Development Group of Vietnam
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