sized for the genus, membranaceousin the dried specimens ; 
perianth segments closely reticulate-nerved. Dorsal sepal 
ovate-lanceolate, acute, up to 2.63 em. long and 1.2 em. 
wide below the middle, with seven main nerves. Lateral 
sepals similar, asymmetric, acuminate, up to about 2.8 
em. long and 1.3 cm. wide, with six to eight prominent 
nerves near the base. Petals oval, slightly asymmetric, 
broadly obtuse or rounded at the apex, up to about 1.9 
em. long and 1.2 em. wide, with seven prominent nerves. 
Lip clawed, lightly 3-lobed just below the middle, cu- 
neate at the base: claw short and broad, about 5.6 mm. 
long, fleshy below, membranaceous above, 
slightly dilated and gradually passing into 
the lamina; lamina ovate-oblong in out- 
line, pandurate, up to about 2.1 cm. long 
and 1.1 ecm. wide across the lateral lobes; 
lateral lobes small, semiobovate, with 
rounded apex and irregular obscurely 
thickened margins; mid-lobe ovate or ob- 
long-ovate, up to about 1.2 em. long and 
1 cm. wide near the middle, irregularly 
lobulate-apiculate, with irregularly cren- 
ulate and papillose-thickened margins; Lip, twice natu- 
the basal and central part of the dise on ral size. 
the upper surface entirely covered by a dense mass of 
about ten lines of crowded fleshy pustulose ridges, the 
outer one or two on each side diverging onto the lateral 
lobes where they are usually supplemented by several 
irregular masses of papillae; toward the apical portion of 
the lip the pustulose ridges become more separated and 
diminish into indistinct papillae near the apex; the un- 
der surface of the lip near the apex is slightly pustulose. 
Column more or less broadly winged on each side, arcu- 
ate, dilated above, up to about 1.3 cm. long with the an- 
terior basal surface deeply concave. 
[ 56 | 
