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FOC | Family List | FOC Vol. 25 | Orchidaceae | Bulbophyllum

9. Bulbophyllum sect. Anisopetalon (Hooker) Lindley, Veg. Kingd. 181. 1846.

异瓣组 yi ban zu

Anisopetalon Hooker, Exot. Fl. 2: ad t. 149. 1825.

Rhizome creeping or straggling; roots sprouting mainly below pseudobulbs, spreading; new shoots arising from basal node of pseudobulb. Pseudobulbs distinct, apex with 1 leaf. Leaves persistent, thick. Inflorescence solitary, arising near pseudobulbs, an elongate or somewhat contracted raceme. Pedicel with basal node coinciding with attachment of subtending bract. Sepals: margins glabrous, 3-veined; lateral sepals ± fused along their lower margins. Petals: margins glabrous to erose, 1-3-veined; lip: margins without retrorse auricles on each side of ligament, with antrorse, often denticulate auricles higher up along margins (absent in Bulbophyllum brevispicatum), margins otherwise ± glabrous to denticulate, adaxially ± glabrous. Column: stigma not protruding at its base, foot distinct; anther: front margin not or slightly projecting, abaxially with or without a low, rounded crest; pollinia 4, inner 1/2 as long as outer or longer, all without appendages.

About 38 provisionally accepted species (several taxa are of uncertain status): India to Vietnam and Peninsular Malaysia; five species (one endemic) in China.

1 Lip without basal auricles on both sides.   33 B. brevispicatum
+ Lip with 2 basal auricles on both sides   (2)
2 (1) Raceme ca. 8 cm, sparsely flowered.   34 B. rufinum
+ Raceme 2-7 cm, densely flowered   (3)
3 (2) Flowers yellowish white; floral bracts much longer than flowers; petals acute at apex.   35 B. bittnerianum
+ Flowers yellowish green or yellowish brown, with purplish red spots or stripes; floral bracts nearly as long as or slightly longer than flowers; petals cuspidate or shortly caudate at apex   (4)
4 (3) Basal auricles of lip subsquare, apex truncate and slightly retuse; column with deltoid teeth.   36 B. crassipes
+ Basal auricles of lip falcate, apex apiculate and unequally 2- or 3-toothed; column with subulate teeth.   37 B. orientale


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