vel acuminatae. Sepalum dorsale late lanceolatum, ob- 
tusum, cucullatum. Sepala lateralia anguste oblonga, 
obtusa, cucullata. Petala elliptico-oblonga, obtusa. La- 
bellum calecaratum; lamina late oblonga vel subquadrata, 
obscure trilobata, emarginata; discus carnosus et callo- 
sus; calcar simplex, intus bicallosum, callo sutriforme 
ornatum. 
Small erect or ascending, terrestrial herbs up to about 
25 cm. long. Stems slender, leafy up to about the mid- 
dle. Leaves petiolate; lamina 2.5—4.5 em. long and 1-2 
em. broad, elliptic to (usually) ovate-lanceolate, acute ; 
petiole 1-1.5 cm. long, constricted below the lamina 
but expanded at the base and amplexicaul or semiam- 
plexicaul. Inflorescence a dense, few-flowered raceme ; 
rachis and stem immediately below the inflorescence pu- 
bescent; bracts up to 8 mm. long, linear to linear-lan- 
ceolate, acute or acuminate, cucullate. Flowers green. 
Dorsal sepal about 4mm. long and 2 mm. broad, broadly 
lanceolate, obtuse, cucullate, 1-nerved, the apex callose- 
thickened. Lateral sepals about 4 mm. long and 2-2.5 
mm. broad, narrowly oblong, obtuse, 1-nerved, cucul- 
late, the apex callose-thickened. Petals 8.5-4 mm. long 
and 1.5-2 mm. broad, elliptic-oblong, obtuse, 1-nerved, 
the apex callose-thickened, rapidly constricted at the 
base, lightly adnate to the dorsal sepal. Lip spurred; 
lamina about 8 mm. long and 2.5-8 mm. broad, broadly 
oblong or subquadrate, three-lobed with the lateral lobes 
small, basal and inconspicuous, the margins membrana- 
ceous and strongly involute, the apex emarginate, the 
dise thickened and with a longitudinal fleshy callus which 
is more or less divided at the base; spur about 5-6 mm. 
long and 2.5-8 mm. in greatest diameter, constricted at 
the throat, becoming broad and inflated in the middle 
but again constricted at the simple tip, with a suture-like 
callus-thickening on the posterior side and with two re- 
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