Bulbophyllum stipulaceum Schltr. in K.Schum. & Lauterb., Nachtr. Fl. Deutsch. Schutzgeb. Südsee (1905) 217
Type: Schlechter 13993 (holo B, lost; iso BM, BO, BR, K, P)
Rhizome patent or pendulous, up to 25 cm long, 0.5-1.2 mm diam. Pseudobulbs (ob)ovoid, ellipsoid or globular, 0.3-1.8 cm apart, 0.2-0.4 by 0.15-0.3 cm, not or hardly flattened. Petiole 0.5-1 mm. Leaf blade ovate to elliptic, 0.6-0.5 by 0.1-0.3 cm, index 3.6-10, tip acuminate. Inflorescence 0.3-0.5 cm, 1-flowered. Peduncle 0.1-0.25 cm; bracts 1, 1.5-2.5 mm. Floral bracts tubular, 1-2.5 mm, tip acuminate. Pedicel and ovary 0.5-1 mm, with the node 0.1-0.3 mm from the floral bract. Flowers widely opening. Median sepal ovate, 1.5-2 by 0.6-1.3 mm, index 1.3-2.5, tip obtuse to acuminate; rather thin; glabrous. Lateral sepals free, oblique, 1.3-2 by 0.4-1 mm, index 1.5-3.3; otherwise as the median sepal. Petals distinctly oblique, obovate, with an inconspicuous to very distinct (sometimes projecting far beyond the actual tip of the petal) wing-like, rounded to subacute projection along the lower margin, 0.25-0.6 by 0.3-0.6 mm (the length measured along the midvein, ignoring the wing along the lower margin; the width measured perpendicularly on the length), index 0.6-1.2, tip obtuse; thin; glabrous. Lip approx. straight, general outline approx. hastate, constricted approx. half-way with the top part projecting, 0.5-0.8 by 0.4-0.5 mm, index 1.4-2 (not spread), tip obtuse to acute; rather thick, thinner towards the tip; glabrous; adx. with a distinct basal concavity, basal teeth converging, together forming a transverse ridge, with a notch half-way, basal part of the lip concave, gradually passing into the approx. flat top part of the lip; abx. without a median ridge. Column from ovary to the tip of the rostellum 0.25-0.4 mm; rostellum distinctly protruding; stigma ovate, not or hardly protruding at its base; column-foot with a distinct, rounded central knob above the attachment of the lip. Stelidia absent or inconspicuous, if present deltoid, tip obtuse. Anther abx. with a ridge towards its base; front somewhat protruding. (After Vermeulen, 1993)
Colours: Flowers entirely pale yellow or pale greenish.
Habitat: Epiphyte in lower montane forest; 350-2800 m.
Flowering time in the wild: January, February, March, June, August, September, October, November.
Distribution: Malesia (New Guinea).
Distribution in New Guinea: Papua (Indonesia); Papua New Guinea; see map 96-1755M.jpg.
Cultivation: Intermediate growing epiphyte.