*) 
APOSTASIACE® OF THE MALAY PENINSULA. 371 
elevatus. [ostellwm lobis lanceolatis decurvis bifidum. Stigma 
ovoideum, profundum, viride; columns# margines valde in- 
crassati. Capsula } poll. longa; coste steriles lineares, fertiles 
multo latiores. 
Hab. Southern Siam: Ghirbee, C. Curtis; (fl. Hort. Bot. 
Penang, June, 1893). 
A single plant of this remarkable species alone was found. 
The most striking feature of it at first sight is the large size 
of the bracts, which almost conceal the flowers. The sepals, 
which are deep purple with a narrow green margin, are 
thickened on the back into a keel, which is eventually pro- 
longed beyond the rest of the sepal. The lip is boat-shaped, 
with two pink horns diverging at the point. The callus does 
not penetrate into the spur, but partially blocks the mouth. 
The column is very curious; the base below the stigma is 
very short and broad; the stigma itself is small, but the sides 
of the column are produced forwards and much thickened, 
so that the entrance to the stigma is really large. The 
clinandrium slopes backwards, and is thickened in front above 
the rostellum into a kind of boss over which the pedicel of the 
pollinia lies. Thus the front of the clinandriun is absolutely 
closed. This raised portion may be either a continuation of 
the lateral margins of the clinandrium connate in the middle 
line, or may be the stelidia raised above the stigma and connate 
at their apices. 
PELATANTHERIA, Ridl., genus nov. 
Caules longi, erecti, radicantes. Folia oblonga, obtusa, 
coriacea, apice biloba. Flores mediocres vel parvi, in racemis 
brevibus lateralibus pauci. Sepala lanceolata vel ovato-lan- 
ceolata; petala subsimilia. Labellum calcaratum ; lobi laterales 
columne adnati; epichilium majusculum planum ; callus basalis 
in calearis fauce situs; callus epichiliaris dentiformis. Columna 
brevis, lata; stelidia elongata, erecta. Anthera magna, ovata, 
plana, bilocularis; pollinia 2; caudiculus brevis, latus, sub- 
quadratus angulis sursum curvis; discus subequilongus, magnus, 
reniformis vel subquadratus. 
This genus is allied to Sarcanthus, though totally different 
in habit. The stems are usually tall, and the racemes short. 
2B 2 
