America, but the inflorescence and flowers are more like 
those of the Indian B. cylindraceum, Lindl., in which the 
bulbs are practically absent, monophyllous, and the leaves 
long petioled. In such a diversified genus it is not always 
certain which set of resemblances best represent genetic 
affinities. In any case B. crenulatum has one near ally, 
namely, B. robustum, Rolfe, based on materials collected 
in Madagascar by the Rev. R. Baron, F.L.S. (nn. 2324, 
2723), which is quite similar in habit and floral structure, 
but is more robust, has narrower lateral sepals, and the 
ovary is without the very characteristic serrulate wings of 
the present one. 
Descr.—An epiphyte with stout, woody rhizomes. Bulbs 
broadly oblong, quadrangular, two-leaved, about an inch 
and a half long, an inch broad. Leaves elliptical-oblong, 
obtuse, subsessile, two to three inches long, nine lines — 
broad, coriaceous. Scapes suberect, stoutish, five to six 
inches high, clothed with about six ovate-oblong apiculate 
sheaths four to six lines long, and tubular at the base; 
raceme drooping, two inches long, with a thickened, clavate __ 
rhachis, dense-flowered, dull purple. Bracts transversely 
oblong, obtuse, one line long, purple. Flowers two lines” r 
long. Ovary stout, with six serrulate angles or narrow 
wings. Dorsal sepal ovate, obtuse, three-nerved ; lateral 
pair united into a broadly rounded, bilobed, fleshy organ, 
with serrulate margin, colour yellow, with reddish nerves. 
Petals linear-oblong, obtuse, one-nerved. Lip sunk into a 
cavity formed by the lateral sepals, ovate, obtuse, very 
fleshy, with a somewhat recurved margin and an irregular — 
obscurely five-lobed callus on the disc. Column very — 
short and broad, with a pair of broad tridenticulate 
teeth ; foot short and broad, with a narrow attachment to 
the limb.—R. A. Rourz. 
Fig. 1, bract; 2, flower; 3, the same with the sepals removed; 4, lip; 
6, column showing the teeth and foot; 6, anther case; 7, pollinia :—all much 
enlarged. ; 
