l88 TlMEHRI. 
attention. These are represented from among the 
plants collected during the Roraima expedition by two 
species of Epidendrum (E. Schomburgkii, Lindley [No. 
13] and E. elongatum, Jacq. [No. 427]). These seem 
to me to be forms, from the bare, rocky ground of the 
interior of the country, which correspond more or less 
closely with three, (in a fresh state evidently very dis- 
tinct,) forms, dried herbarium specimens of which have 
all been classed under the one name of E. imatophyllum, 
and all of which occur on trees near the coast. Of these 
coast forms, the most distinct is a small almost constantly 
bifloral form which occurs on trees overhanging the 
brackish water at the estuaries of the rivers ; another, 
occurring on trees slightly higher up the rivers, is in 
general facies and colour very similar to the typical 
E. Schomburgkii ; and the third, occurring in similar 
positions, but more sparingly, more nearly approaches in 
facies E. elongatum, but is constantly of a peculiar scar- 
let colour. The two last mentioned forms, unlike any 
of the other, are invariably associated with ants, either 
because these creatures prefer to make their nests in the 
roots of the plants, or because the seeds of the plants 
find their most suitable nidus, and germinate, in the ants' 
nest. 
