margine exteriore erosa. Labellum sessile; lamina in 
positu naturali arcuata, basi saccato-globosa et papillis 
intus praedita, trinervia, cum marginibus superioribus 
erosis; lamina expansa late oblongo-pandurata, supra 
medium constricta, tandem in apicem rotundatum vel 
retusum minute plicatum dilatata. Columna generis. 
Plant terrestrial, with a prostrate rhizome, erect- 
ascending, large for the genus, 5—7 dm. tall. Stem leafy 
and glabrous on the lower half, bracteate and glandular- 
pubescent above; bracts acuminate, 1.5-8.5 cm. long. 
Leaves five to eight, rather large, with conspicuous in- 
flated clasping petioles; petioles tubular at the base, up 
to 4 em. long; lamina obliquely elliptic-lanceolate, acu- 
minate, submembranaceous, 7.5-11.5 cm. long, 2—3.5 
em. wide. Inflorescence a cylindrical spicate raceme, 
rather densely flowered, 6.5—7 cm. long, 2.5 cm. in diam- 
eter; rachis glandular-pubescent. Floral bracts ovate- 
lanceolate, acuminate, glandular-pubescent, 9-12 mm. 
long, about 8.5 mm. wide near the base. Flowers ringent, 
with stout glandular-pubescent pedicellate ovaries which 
are about 1 cm. long. Dorsal sepal lanceolate, tapering 
to an obtuse apex, 1-nerved, canaliculate, 6—-6.5 mm. 
long, about 2 mm. wide. Lateral sepals somewhat ob- 
lique, ovate-lanceolate, obtuse, 1-nerved, concave below, 
6.5 mm. long, 3.2 mm. wide below the middle. Petals 
with a slender claw, adherent to the dorsal sepal, semi- 
rhombic, obtuse, 1-nerved, erose on the outer margin, 
slightly denticulate on the inner margin above the mid- 
dle, 6 mm. long, 2.5 mm. wide at about the middle. Lip 
sessile, arcuate in natural position, with a globose-saccate 
base (the sac about 2.5 mm. deep and provided with pap- 
illae on the inner surface), 8-nerved, erose on the margins 
above the middle; when spread out broadly oblong- 
pandurate with a suborbicular-ovate base, 6 mm. long, 
4.5 mm. wide across the base, 2.5-8 mm. wide across 
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