Notes on Plants at Roraima. 187 
Humboldtii, Like the Brocchinia this plant grows both at 
the Kaieteur and on Roraima ; but at the former station 
it apparently always grows floating in the water retained 
in the leaf-axils of the Brocchinia, while on Roraima it 
grows abundantly with its roots in the ground and only 
very rarely in the close association with the Brocchinia. 
The Roraima plant is, moreover, far more beautiful — its 
flowers are of a far more intense colour — than is the 
Kaieteur plant. This latter circumstance is possibly 
greatly due to the greater vigour which the plant obtains 
when its roots are in the ground. I have already al- 
luded to the occurrence of a very similar Uiricularia 
on the Organ Mountains associated with a huge brome- 
liad just as it is at the Kaieteur with the Brocchinia. 
Next, the two other large-flowered species of Uiricu- 
laria from Roraima claim notice. U. Campbellianum 
has already been described. It occurs abundantly, but 
apparently only on the forest slope and for some distance 
from this up the cliff. It is new to science. The other 
species U. montame Jacq. aff. [No. 293] appears to 
occur only in crevices in the rocks on the summit. It is 
not new to science, having been previously recorded from 
Guiana, several of the West India islands, and other 
parts of Tropical America. The two species though 
somewhat alike in general character, are, at a second 
glance, evidently very distinct. U. Campbellianum is 
altogether a more delicate plant, its leaves are much 
smaller, rounder, and its stems are shorter ; its bladders 
are disc-shaped. The other species U. montanse Jacq, 
aff. is altogether a stouter plant with longer-stalked, 
strap-shaped leaves, and with spindle-shaped bladders. 
To one other set of plants I should here like to call 
