Descriprion.—//erb ; epiphytic, erect ; stems elongated, 
somewhat thickened below the middle, 14-3 ft. long, 
striate, closely leafy; internodes 3-1 in. apart. Leaves 
oblong or elliptic-oblong, acute or very shortly 2-lobed, 
nearly 2 in. long, 5-8 lin. wide. Racemes lateral, produced 
near the apex of the stems, 3-1 in. long, 3—4-flowered, 
clothed at base with short sheaths; bracts wide ovate-oblong, 
somewhat acute, membranous, 1-14 lin. long; pedicels 
about 13 in. long, terete. Flowers large, white with purple 
stripes on the disk and the lateral lobes of the lip. Sepals 
white, the upper lanceolate, acute or acuminate, keeled, 
about 14 in. long; lateral oblong-lanceolate, acute or 
acuminate, keeled, about 13 in. long, oblique at the base 
and produced into a conical acuminate mentum 3 in, long. 
Lip 3-lobed, 12 in. long, lateral lobes rounded or almost 
truncate, 5 lin. wide, central lobe obovate, truncate or 
obscurely 2-lobed, crenulate, 3-1 in. wide. Column broad. 
Fig. 1, column; 2, anther-cap ; 3, pollinia; 4, sketch of an entire plant:— 
all enlarged except 4, which is much reduced. 
