Herba habitu robustiore, caulibus minus ramosis cum 
ramis strictis, foliis majoribus, floribus majoribus atque 
labelli parte anteriore majore a specie differt. 
Plant large and stout, up to over 83 cm. high (the 
longest stem incomplete in our specimen). Stems caes- 
pitose, strict, one-branched and often superposed with 
shorter members above, about 7-jointed or less, entirely 
concealed by more or less elongate close and imbricating 
tubular sheaths which are densely pilose when young, 
about 23 cm. or less long, the branches often very short. 
Leaves solitary at each terminal joint of the stem or 
branch, elliptic-lanceolate to narrowly oblong-lanceolate, 
acuminate with an acute mucronate apex, cuneate at the 
sessile base, commonly rigidly erect and coriaceous, up 
to 17.1 cm. long and 2.3 cm. wide, the uppermost leaves 
(on the branches) much smaller. Inflorescences axillary, 
glomerate, densely many-flowered. Flowers dark brown, 
campanulate, with the segments recurved above. Dorsal 
sepal lanceolate, acuminate with an acute apex, 5-nerved 
near the base with the lateral nerves branched, about 
1.52 cm. long and 4.2mm. wide. Lateral sepals similar, 
obliquely lanceolate, connate toward the base, about 1.47 
em. long when expanded and 4.2 mm. wide across the 
base of the free portion. Petals somewhat longer than 
the dorsal sepal, from an obliquely ovate-lanceolate base 
contracted into a narrowly linear cauda which is acute 
at the tip, 3-nerved, about 1.92 cm. long and 2.9 mm. 
wide below. Lip much shorter than the other segments, 
arcuate-recurved below the middle, 5 mm. long in nat- 
ural position, very shortly clawed, broadly oblong in 
outline when viewed from above, rounded in front with 
irregularly dentate-erose margins and an erect-spreading 
tooth on each side in the middle of the somewhat nar- 
rower basal half; disc through the lower part with a pair 
of erect fleshy recurved keels. Column minute, about 3 
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