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Tên Khoa học: Bulbophyllum dasystachys J.J. Verm.
Tên tiếng Anh:
Tên tiếng Việt: Cầu diệp vàng
Tên khác:

MÔ TẢ CHUNG

Short creeping or clustering trunk or branch epiphyte. Rhizome rigid, semi-woody, 2–3 mm in diam., with close pseudobulbs, touching each other. Pseudobulbs green, broadly ovoid to ovoid oblate, (0.8)1–1.2(1.5) cm in diam., 0.8–1(1.2) cm tall. Leaf obscurely petiolate; leaf blade coriaceous, narrowly oblanceolate, 8–12 cm long, 1.5–2.2 cm wide, tapering into terete, shallowly grooved petiole-like base. Inflorescence erect or somewhat patent, long stalked, lax, many flowered secund raceme to 60 cm tall; peduncle to 40 cm long, straight, light greenish, with few small sterile papyraceous scales at the base, naked above; rachis to 20 cm long, densely papillose, apically slightly curved, with few flowers opening simultaneously. Floral bracts papillose, brownish, narrowly triangular, acuminate, (5)6–7 mm long, 0.8-1.2 mm wide. Pedicel and ovary 2-4 mm long, terete, densely papillose. Flowers spirally arranged, nodding, turned on one side, widely opening, 5-6 mm across. Sepals subsimilar, olive-brown to dark brown, densely hairy with long soft hairs, spreading, narrowly triangular-ovate, obtuse, 2.5-3 mm long, 1.8-2 mm wide. Petals triangular narrowly ovate, obtuse, green to brownish, 0.8-1 mm long, 0.5-0.6 mm wide, ciliate at apex. Lip dull brown-purple with greenish glabrous spot on epichile, fleshy, narrowly oblong obovate, 1.8-2 mm long, 1-1.2 mm wide, recurved near the base, rounded at apex, hirsute, long ciliate along the margin, at the base with 2 down directed, triangular dents. Column light greenish, shortly cylindric, 1.5-1.6 mm tall, with large, forward curved, subulate, apically swollen white stelidia 0.8-1 mm long; operculum yellow, hemispheric, finely papillose, 0.5-0.6 mm in diam.

Habitat, phenology and conservation status.

Creeping branch epiphyte. Primary broad-leaved evergreen submontane forests. (700)1000–1200 m. Fl. March, November – January. Very rare.

Tentatively estimated

IUCN Red List status – DD

Distribution.

Vietnam: Dak Lak (Chu Yang Sing Mountains), Khanh Hoa (Hon Ba Mountains) and Lam Dong (Bidoup Mountains; Dalat City area; Dam Rong district) provinces. Thailand.

Short creeping or clustering trunk or branch epiphyte. Rhizome rigid, semi-woody, 2–3 mm in diam., with close pseudobulbs, touching each other. Pseudobulbs green, broadly ovoid to ovoid oblate, (0.8)1–1.2(1.5) cm in diam., 0.8–1(1.2) cm tall. Leaf obscurely petiolate; leaf blade coriaceous, narrowly oblanceolate, 8–12 cm long, 1.5–2.2 cm wide, tapering into terete, shallowly grooved petiole-like base. Inflorescence erect or somewhat patent, long stalked, lax, many flowered secund raceme to 60 cm tall; peduncle to 40 cm long, straight, light greenish, with few small sterile papyraceous scales at the base, naked above; rachis to 20 cm long, densely papillose, apically slightly curved, with few flowers opening simultaneously. Floral bracts papillose, brownish, narrowly triangular, acuminate, (5)6–7 mm long, 0.8-1.2 mm wide. Pedicel and ovary 2-4 mm long, terete, densely papillose. Flowers spirally arranged, nodding, turned on one side, widely opening, 5-6 mm across. Sepals subsimilar, olive-brown to dark brown, densely hairy with long soft hairs, spreading, narrowly triangular-ovate, obtuse, 2.5-3 mm long, 1.8-2 mm wide. Petals triangular narrowly ovate, obtuse, green to brownish, 0.8-1 mm long, 0.5-0.6 mm wide, ciliate at apex. Lip dull brown-purple with greenish glabrous spot on epichile, fleshy, narrowly oblong obovate, 1.8-2 mm long, 1-1.2 mm wide, recurved near the base, rounded at apex, hirsute, long ciliate along the margin, at the base with 2 down directed, triangular dents. Column light greenish, shortly cylindric, 1.5-1.6 mm tall, with large, forward curved, subulate, apically swollen white stelidia 0.8-1 mm long; operculum yellow, hemispheric, finely papillose, 0.5-0.6 mm in diam.

Habitat, phenology and conservation status

Creeping branch epiphyte. Primary broad-leaved evergreen submontane forests. (700)1000–1200 m. Fl. March, November – January. Very rare.

Tentatively estimated

IUCN Red List status – DD.

Distribution. Vietnam: Dak Lak (Chu Yang Sing Mountains), Khanh Hoa (Hon Ba Mountains) and Lam Dong (Bidoup Mountains; Dalat City area; Dam Rong district) provinces.

Thailand.

ẢNH

Bulbophyllum dasystachys and B. clipeibulbum on Taiwania 62(1).jpg at www.BotanyVN.com

Ảnh 1. Bulbophyllum dasystachys and B. clipeibulbum on Taiwania 62(1).jpg

 

PHÂN LOẠI KHOA HỌC
Giới: Thực vật
Ngành: Magnoliophyta
Lớp: Liliopsida
Bộ: Orchidales
Họ: Orchidaceae
Chi: Bulbophyllum

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