positu naturali erectum, columnae parallelum, tubulari- 
concavum et apice recurvum, trilobatum; lobi laterales 
truncato-rotundati, erecto-incurvi; lobus medius ovatus. 
Columna prope apicem utrinque dentata. 
Plant slender, caespitose, epiphytic, up to 29.5 em. 
high. Roots fibrous, numerous, glabrous, slender. Stems 
slender, often superposed, sometimes forking and _ pro- 
ducing roots at the nodes, up to 10 cm. long (the upper 
members much shorter), when young concealed below by 
several close distichous sheaths bearing leaf-blades which 
increase in size upward, becoming naked in age. Leaves 
mostly in pairs, subopposite at the nodes, narrowly lin- 
ear, sessile, up to 19.5 cm. long and 4 mm. wide, minutely 
bilobed and apiculate at the apex, slightly narrowed and 
more or less conduplicate above in the dried specimen, 
nervose with five nerves more prominent, gramineous. 
Inflorescences one or two in the axils of the upper 
leaves, abbreviated, about 2-flowered. Flowers whitish. 
Dorsal sepal oblong, acute, longitudinally concave, cucul- 
late at the apex, distinctly 3-nerved, about 6 mm. long 
and 2 mm. wide. Lateral sepals oblong, very oblique, 
acute, longitudinally concave, dorsally keeled at the apex, 
concave-saccate at the base and forming a short spur-like 
mentum with the short column-foot, about 5.5mm. long 
and 2mm. wide. Petals obliquely falcate-linear, abruptly 
acute, 8-nerved, about 6 mm. long and 1.2 mm. wide 
slightly above the middle. Lip erect and parallel to the 
column in natural position, longitudinally concave, re- 
curved and sharply 8-lobed near the apex, about 6.2 mm. 
long when expanded; lateral lobes erect in natural posi- 
tion, dilated from a gradually cuneate base, obliquely 
rounded-subtruncate at the free apex; mid-lobe triangu- 
lar-ovate, subacute, about 1.8 mm. long; dise 5-nerved, 
with a pair of obscure fleshy calli between the lateral 
lobes. Column straight, deeply longitudinally concave in 
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