Bulbophyllum pachyacris J.J.Sm., Bull. Dép. Agric. Indes Néerl. 19 (1908) 7
Type: Versteeg 1357
Plant very small. Rhizome pendulous, c. 2.5 cm long; sheaths tubular, keeled, subulate-acuminate, covering the upper pseudobulbs. Pseudobulbs appressed to the rhizome, small, semiterete, in front flattened, truncate, 0.3-0.4 cm apart, 0.2 cm long; 1-leaved. Leaf narrowly lanceolate, somewhat obliquely acute, c. 2.5-3 by 0.43-0.47 cm; above longitudinally grooved; apex minutely serrulate. Inflorescences 1-flowered, subfasciculate, very short; peduncle with several tubular sheaths, 0.2 cm long. Floral bracts cyathiform, acuminate, slightly longer than the ovary, 0.1 cm long. Flower very small, 0.45 cm wide. Median sepal narrowly oblong, concave, 3-nerved, 0.38 by 0.13 cm; apex somewhat narrowed and thickened. Lateral sepals diverging, oblong-triangular, concave, 3-nerved, 0.43 by 0.17 cm; apex somewhat narrowed, thickened. Petals smaller, obovate-spathulate, shortly obtuse, acuminate, 1-nerved, 0.25 by 0.1 cm. Lip mobile, clawed, 3-lobed, 0.1 cm long; claw parallel with the column-foot, erect, membranous, cuneate, 0.03 cm long; blade recurved, concave at the base, separated from the claw by a transverse fleshy callus, 0.07 cm long; lateral lobes erect, rounded, convex; mid-lobe recurved, ovate, obtuse, convex, 0.04 cm long. Column very short, 0.07 cm long; column-foot very short, straight, 0.06 cm long. Ovary 0.08 cm long. (After Smith, 1909)
Colours: Flower white spotted brown. Lip orange-red.
Habitat: Epiphyte in lowland forest; 50 m.
Flowering time in the wild: July, October.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua (Indonesia); see map 96-1337M.jpg.
Cultivation: Warm growing epiphyte.