Bulbophyllum stemonochilum J.J.Verm., Nordic J. Bot. 26 (2008) 161, fig. 19
Type: Leiden cult. 20031028 (holo L), from PNG, Woitape
Roots below the pseudobulbs, (at least some) spreading. Rhizome up to 20 cm long, 2-2.5 mm in diameter, sections between pseudobulbs 0.2-0.45 cm long, pendulous, bracts rather persistent. Pseudobulbs 0.7-1.6 by 0.3-0.4 cm, porrect, distant, cylindrical or slightly obovoid, the new shoot arising 2-2.5 mm from the top of the pseudobulb. Leaves sessile, blade 1.8-2.6 by 0.6-1.1 cm, index (length/width) 2.3-3, ovate, acute (-acuminate). Inflorescence c. 0.7 cm long, 1-flowered; peduncle c. 0.3 cm long, porrect; non-floriferous bracts 2, the longest c. 3.5 mm long; floral bract c. 2.8 mm long, tubular, acute. Flowers moderately opening. Pedicel-with-ovary c. 1.2 mm long, basal node coinciding with the bract attachment. Dorsal sepal c. 4.8 by 2.2 mm, index c. 2.2, somewhat recurved, obovate, apiculate, margins ciliolate, base rather broadly attached, rather thin, surface glabrous. Lateral sepals c. 4.4 by 2.1 mm, index c. 2.1, fused, together porrect, concave with distally incurved margins, each obovate, obtuse, upper margin ciliolate, otherwise as the dorsal sepal. Petals c. 1.3 by 0.8 mm, index c. 1.6, porrect, triangular, truncate to emarginate, apiculate, margins entire, base broadly attached, thin, surface glabrous. Lip c. 2.7 by 0.2 mm, index 1.3-1.4, more or less straight, but somewhat curved near the tip, linear, wire-like, obtuse, margins ciliate in the middle third, minutely papillose-ciliolate in the distal third, rather thick; adaxially flat near the base, with a transverse, conical, obtuse, transversely emarginate median tooth at about one sixth of its length, elsewhere somewhat convex and slightly furrowed, surface minutely ciliolate in the proximal half, minutely papillose-ciliolate in the distal half; abaxially slightly convex with a median furrow over its entire length, surface glabrous but distal third minutely papillose. Column c. 1 mm long; stigma large, ovate, without keels inside; foot not widened but with a slight transverse thickening just above the ligament; stelidia c. 0.5 mm long, porrect, triangular, acute, with a slight, deltoid, obtuse tooth along the lower margin; anther-cap abaxially with a high, rounded crest, surface papillose, front margin drawn out into a truncate beak; pollinia 4, more or less ellipsoid, the inner less than half as long as the outer, flattened; no appendages. (After Vermeulen, 2008)
Colours: Sepals maroon, laterals with a creamy-white bifurcate spot in the basal half, dorsal creamy-white, with a purple spot at the base, petals creamy-white, with a purple spot at the base, lip maroon, creamy-white at the base, column and anther-cap creamy-white.
Flowering time in the wild: December.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua New Guinea; Papua New Guinea; see map 96-2339M.jpg.