stigma and pollen. In the plant here figured I found the 
anther and stigma well developed, but the cirrhi were not 
sensitive, and the pollen masses were very small and 
apparently imperfect, whence I assume that this was a 
hermaphrodite form, with a functionally imperfect fertilizing 
apparatus. 
C. callosum is a native of La-Guayra and Venezuela, from 
which latter country the specimen here figured was pro- 
cured. It was presented to the Royal Gardens by Mr. 
Sander, of St. Albans, and flowered in the Orchid-house in 
December of last year. Other varieties are described as 
CO. Lansbergii, Lind]. (Lindl. and Paxt. Fl. Gard.vol.i.p.156), 
and var. erenatum, Regel (Gartenfl. vol. v. p. 275). 
Drscr. Pseudobulbs two to three inches long, clothed 
with sheathes. Leaves six to ten inches long by two to 
three broad, narrowly obovate or oblanceolate, plaited and 
strongly nerved, Scape radical, short; raceme pendulous, 
many-flowered ; rachis very stout, red-brown; bracts half 
an inch, oblong-lanceolate, membranous, Ovary one to 
one and a half inches, slender, curved, red-brown. Perianth 
three and a half inches long, segments all narrowly lanceo- 
late, acuminate, concave, bright-brown. Dorsal sepal and 
two petals quite erect, parallel and contiguous; two lateral 
sepals deflexed, parallel or slightly diverging. Lip one inch 
long, cordate- or hastate-lanceolate, convex, dirty green, 
speckled with red, with a short gibbous sac at the base 
behind, margins slightly toothed ; tip three-lobed, mid-lobe 
elongate and recurved; callus yellow or green. Column 
dirty yellow, as long as the lip, ending in a long, slender, 
erect beak.—J. D. H. 
