oval or ovate-elliptic, rounded or obtuse above with a 
minutely tridenticulate apex, rounded or broadly cuneate 
below, up to 8.5 cm. long and 4.2 cm. wide, chartaceous 
in the dried specimen; petiole 1.5—2 cm. long, slender, 
channelled, gradually merging into the lamina. Inflores- 
cences abbreviated, 1-flowered, few to numerous, in the 
axil of a conspicuous conduplicate spathe which is about 
1.6 cm. long and minutely scabrous below. Flowers me- 
dium-sized, ringent. Dorsal sepal strongly cucullate, lan- 
ceolate-ovate when expanded, about 12.8 mm. long and 
6.3mm. wide, acute or short-acuminate, 3-nerved, mem- 
branaceous. Lateral sepals connate into an oblong-lan- 
ceolate navicular lamina which is sharply bidentate, about 
11.8 mm. long and 4 mm. wide, 4-nerved, membrana- 
ceous. Petals linear-lanceolate in outline, 7.5-8 mm. 
long, with a short subquadrate basal portion which ter- 
minates in a pair of unequal teeth (one on each side), 
acute, 1-nerved throughout or 38-nerved to the middle. 
Lip sigmoid, about 6.4 mm. long in natural position, 
deeply 3-lobed, with the lateral lobes erect and parallel, 
the lower sides of the mid-lobe erect and the sides of its 
rather fleshy upper portion revolute; lateral lobes por- 
rect, arcuate-oblong from an indistinct cucullate claw, 
very obliquely bilobed above, obtuse with the margins 
cucullate-incurved; mid-lobe much larger, shortly 
clawed, narrowly ovate-triangular when expanded, about 
6 mm. long and 4 mm. wide at the rounded base, nar- 
rowed to an obtuse apex, 3-nerved to the middle with 
the elongate mid-nerve clavate-thickened near the apex 
and prominent on the under surface; a small fleshy bi- 
lobed callus stands between the lateral lobes and there 
is a pair of short fleshy thickenings near the base of the 
mid-lobe. Column very short, about 2.4 mm. long at 
the back, gradually much dilated toward the base. 
This species is very similar to P. Hitchcockii Ames 
[ 187 ] 
