Bulbophyllum citrinilabre

Bulbophyllum citrinilabre J.J.Sm., Repert. Spec. Nov. Regni Veg. 12 (1913) 403

Type: Bogor cult. (Exp. Lorentz, Djibdja 530) s.n. (holo BO)

Rhizome pendulous, branched, the top curved upwards, thin, c. 20 cm long, entirely covered with tubular, apiculate, papillose sheaths which soon become many-grooved. Roots sparsely appressed to the rhizome. Pseudobulbs very small, c. 1-1.7 cm apart, spirally arranged, making an acute angle with the rhizome, obliquely oblong, c. 9-ribbed, 0.45-0.55 by 0.2-0.25 cm; 1-leaved. Leaf lanceolate, gradually narrowed to the apex, short-acute, apiculate, coriaceous, c. 2.7-3.7 by 0.6-0.8 cm; base shortly cuneate-obtuse and very shortly conduplicate; midrib above channelled, on either side convex, underneath somewhat prominent. Inflorescences 1-flowered, from the nodes of the rhizome, solitary; peduncle appressed to the rhizome, short, 0.2-0.25 cm long, covered with few small, tubular sheaths which soon become many-grooved. Floral bract clasping and much exceeding the ovary, obtuse, 0.2 cm long; base tubular; above strongly concave. Flower patent, 0.63 cm long; the sepals parallel. Median sepal subulate, towards the base gradually dilated and concave, 0.54 by 0.14 cm at the base. Lateral sepals forming a short, obtuse-angled mentum, concave, gradually subulate-narrowed, 0.6 by 0.16 cm at the base; base obliquely triangular. Petals very small, parallel to the column, obliquely irregularly subelliptic-oblong, subacute, inside on either side of the midrib convex, 0.13 by 0.06 cm. Lip with a very small ligament inserted near the apex of the column-foot, mobile, small, curved, convex, ovate, obtuse; base truncate, when flattened 0.12 by 0.08 cm; basal part channelled, with convex sides; apex convex; inside with longitudinal fascia. Column very short, including the anther slightly over 0.05 cm long; stelidia short, obtuse; stigma triangular, decurrent along the column-foot; column-foot making an obtuse angle with the ovary, its base slightly swollen, its apex very shortly incurved, 0.1 cm long. Anther cucullate, curved, obtuse; connective crested, thickened, yellowish, 0.04 cm long. Pollinia 4, united in 2 subglobose bodies. Ovary rather thick, 6-grooved, 0.14 cm long. (After Smith, 1916)

Colours: Rhizome scales brown. Pseudobulbs shiny, pale glaucous-green. Leaf above shining green, underneath pale green. Peduncle scales brown. Floral bract pale, semitransparent. Sepals yellow, the base yellowish. Lip lemon yellow. Column pale yellowish; column-foot. Anther white; connective yellowish. Pollinia yellow.

Habitat: Epiphyte in lowland forest.

Distribution: Malesia (New Guinea), Solomon Islands.

Distribution in New Guinea: Papua (Indonesia); see map 96-350M.jpg.

Cultivation: Warm growing epiphyte.