Descriprion.— Herb, pseudobulbs elliptic-oblong, sulcate 
and slightly 4-angled, their bases clothed with lanceolate 
sheaths, 2-leaved, about 2 in. long and 3 in. wide, about 
an inch apart on the creeping rootstock. Leaves narrowed 
to a short petiole, elliptic-oblong or lanceolate, acuminate, 
shining above, 5-7 in. long, 1-12 in. wide, prominently 
3-nerved beneath. Scapes slender, many-flowered, pendulous, 
10-14 in. long, clothed below with acute lanceolate sheaths ; 
bracts wide-elliptic, obtuse, convolute, persistent, 7 lin. 
long; pedicels slender, about equalling the bracts. lowers 
pale yellow ; lip white, lateral lobes and centre of mid-lobe 
yellow, the keels with brown markings. Sepals ovate-oblong, 
apiculate, concave, keeled behind, 6-7 lin. long. Petals 
linear-oblong, acute, 6-7 lin. long. Lip 3-lobed, concave, 
6-7 lin. long; side-lobes erect, semi-oblong, rounded at the 
apex ; anterior lobe wide obovate-cblong, undulate, emar- 
ginate; keels 4, undulate, two extending along the disk to. 
near the base with a deep channel between, with two shorter 
lateral ridges. Column curved, broadly winged, about 
5 lin. long. : 
Fig. 1, lip; 2, column; 3, anther-case; 4, pollinia :—all enluryed. 
