SECTION Elasmotopus Schlechter 1925

SYNONYMS = SECTION Hymenosepalum

TYPE: Bulbophyllum oxycalyx Schltr. 1924

Epiphytes or lithophytes with creeping rhizomes giving rise to distant, not laterally flattened, 1 to 2 leaves pseudobulbs that blooms on hetranthous, elongate, racemose, 1 to many flowered inflorescence with an elongate, not thickened, round in section, rachis carrying spirally arranged, resupinate flowers. The free sepals are glabrous abaxially the petal margins are entire, glabrous, to distally minutely papillose. The mobile lip is undivided, thick or with a thick basal part and a thin apical part, the apical part with an adaxial cavity near the apex or apical part of the lip curved upwards or with both characters combined, with entire, glabrous or partly ciliate margins, the adaxial side without ridges or with inconspicuous ridges with an entire edge. The column is deltoid to triangular with acute stelida with or without a tooth along the lower margins. The anther has a rounded protrusion the is taller than the anterior margin. Most of the species in this section also have 3 veined petals.

There are 10 species to date in this Madagascan Section occuring in humid forests at all elelvations.

Entries below with an asterix are listed in publications by J J Vermeullen and so are more likely correct than ones without. Species with a question mark in front, seem to me to not conform and so please use with caution.

1. Bulbophyllum amphorimorphum H.Perrier 1951 Madagascar

2. Bulbophyllum analamazoatrae Schltr. 1924 Madagascar

3. Bulbophyllum aubrevillei Bosser 1965 Madagascar

4. Bulbophyllum francoisii H.Perrier 1937 Madagascar

5. *!Bulbophyllum oxycalyx Schltr. 1924 Madagascar

6. Bulbophyllum pandurella Schltr. 1924 Madagascar