Species Information - Bulbophyllum himantosepalum

Bulbophyllum himantosepalum J.J.Verm. & Sieder -- Malesian Orchid J. 15 (2015) 41.

Type: Hort. Salzburg s.n., WU alc. no.690 (holo WU).

Synonyms:

Small, short-creeping epiphyte with spreading roots. Rhizome 0.2-0..25 cm diam., sections between pseudobulbs, rhizome scales not persistent. Pseudobulbs 0.5-0.9 cm apart, c. erect, ellipsoid-cylindrical to ovoid-cylindrical, not angular, 0.9-1.3 by 0.4-0.8 cm. Leaf elliptic, 1.7-3.8 by 0.9-1.8 cm, index 1.6-2.1; petiole 0.2-0.4 cm long; apex rounded. Inflorescence c. 14 cm long, 1 -flowered; peduncle c. 7.5 cm long; scales c. 4. Floral bract c. 1.3 cm long. Pedicel and ovary c. 2 cm long; basal node c. 0.3 cm above the floral bract attachment. Median sepal free, c. porrect with an incurved apex, c. triangular, c. 1 by 0.2 cm, index c. 5 (without spreading); strongly folded along the midnerve; abaxially distinctly keeled, slightly less so near the base; margins entire; apex acute; glabrous except the margins sparsely and minutely papillose; 3-nerved. Lateral sepals free, flat, not keeled, slightly recurved, slightly falcate, ovate-oblong, c. 4.4 by 0.7 cm, index c. 6.3; margins entire; apex rounded; glabrous; 5-nerved. Petals porrect, c. triangular, c. 0.45 by 0.12 cm, index 3.7- 3.8; margins entire or slightly and minutely erose towards the apex; apex acuminate; glabrous; 3-nerved. Lip recurved near the apex, c. ovate, c. 0.21 by 0.11 cm, index c. 1.9 (without spreading); margins entire, sparsely and minutely hirsute; near the base; adaxially slightly concave, with a slight median depression which continues as a median slit over most of the length of the lip but which opens near the apex to allow space for a slightly raised median callus, surface short-hirsute near the base except for the glabrous median depression, and long­ hirsute with antrorse hairs in the central part; abaxially with a distinct ridge over most of its length, with a c. flat crest, surface further glabrous; apex obtuse. Column including stelidia c. 0.2. cm long; rostellum not protruding, stigma inverted triangular; column foot at the apex not widened; stelidia porrect, deltoid, c. 0.03 cm long; apex acute, with a distinct, antrorse, deltoid, acute tooth along the upper as well as the lower margin, close to the apex; pollinia 2.
(after Vermeulen & Sieder 2015)

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