Guiana, where it grows on trees by the river’s banks ; and recently Im Thurn 
has collected it at the Corentyne River, and Jenman at the Essequebo River, in 
the same country. It also grows in the island of Tobago, whence fine herbarium 
specimens hâve been sent by Meyer. 
In the wild state the hollow stems of this species are tenanted by small ants, 
which find ingress through a cleft at the base, which is invariably présent in 
the new growths, even under cultivation. 
For its successful cultivation, a high température and moist atmosphère are 
necessary, especially while the plant is growing. It is somewhat difficult to 
establish, unless the pseudobulbs are thoroughly sound, for they are apt to decay 
from within, and if cracked during transmission, as is said to be frequently the 
case, they never get well established. 
The plant described as Epidendrum indivisum Bradford (Griseb. FL Brit. 
W. Ind ., p. 614), which has recently flowered at Kew, appears to be only an 
abnormal cleistogamous variety of this species. It is a native of Trinidad. 
The following are the other species of the genus : — 
D. bidentatum Hemsl. Biol. Centr. Amer., III, p. 221. Epidendrum bidentatum 
Lindl., G en. et Sp. Orch., p. 98. — Native of Mexico. 
D. bigibberosum Hemsl. /. c., p. 222. Epidendrum bigibberosum Rchb. f., 
in Walp. Ann., VI, p. 346. — Native of Guatemala, according to Reichenbach; 
formerly cultivated by Consul Schiller, at Hamburgh. 
D. bilamellatum Hemsl. I. c., p. 222. Epidendrum bilamellatum Rchb. f., 
in Walp. Ann., VI, p. 345. — Native of Panama and Caraccas. 
These three species are at présent very imperfectly known, and their exact 
relation to E. bicornutum somewhat doubtful. The first is only known to me by 
a sketch of a single fiower in Lindley’s Herbarium. The second is said to hâve 
been re-introduced into British collections from the valley of the Magdalena, 
where it occurs in the damp jungle that Unes the river side, and to be simply a 
miniature form of the type as regards its flowers. The third I only know by 
description. There are however unnamed specimens at Kew from Nicaragua, 
Venezuela, and Colombia, which probably belong in part to the above. The 
genus will require careful re-examination when more material accumulâtes. 
R. A. Rolfe. 
