Characterized by a short, footless column to which the 
fleshy lip is immovably adnate. Rostellum bifid, hammer- 
shaped. Pollinia 2, each split into unequal halves on a 
slender stipe. Lip more or less bucket-shaped with a 
distinct tongue or valvate callus, often forked at the tip 
projecting from the backwall diagonally across toward 
the apex. 
Pomatocalpa bambusarum (King & Pantl.) Garay, comb. nov. 
Basionym: Sarcanthus bambusarum King & Pantl. in Journ. As. 
Soc. Bengal 65: 123, 1896. 
Pomatocalpa falciforme (Tixier) Garay, comb. nov. 
Basionym: Camarotis falcijformis Tixier in Bull. Mus. Nat. Hist. 
Paris, ser. 2, 36: 162, 1964. 
Syn. : Pomatocalpa laoticum Seidenf. in Nat. Hist. Bull. Siam Soc. 
23: 568, 1970. 
Porphyrodesme Schltr. in Fedde Rep. Beih. 1: 982, 
Sept. 1, 1913. 
Type: Saccolabium porphyrodesme Schitr. 
Characterized by a short footless column with a well- 
developed rostellum which is more or less sigmoid with 
its bifid apex turning suddenly upward. The stigma is 
small, completely hidden at the base under the rostellum. 
Pollinia 2, more or less unequally cleft on a linear stipe. 
Lip firmly adnate to base of column, bucket-shaped, 
laterally compressed with the lateral lobes arcuately 
spreading, but coming together so as to leave only a 
narrow slit for the entrance to the spur. 
These peculiar characters are obviously closely con- 
nected with the pollinating mechanisms, and have been 
described in detail by Ridley for Renanthera elongata 
Lindl. and Dendrocolla minima Ridl. Renanthera sar- 
canthoides J.J.Sm. is Porphyrodesme papuana Schltr. 
It is possible that Renanthera moluccana Bl. also be- 
longs here. 
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