OBSERVED DURING THE RORAIMA EXPEDITION. 265 
high-drawn terrestrial orchids, pallid plants with inconspicuous and pale flowers (Steno- 
ptera viscosa, Reichb. f. | No. 181]). 
Undoubtedly the most striking feature of the vegetation of this jungle-belt was the 
curious abundance and variety of the Ferns. Of these, two seem to require special 
mention here. One is the Gymnogramme (Хо. 181] already mentioned as occurring 
on the rocks in the swamp; it was abundantly distributed from the swamp nearly to 
the top of the mountain. It will be further mentioned in connection with a closely 
allied species occurring on the top. The second fern to be distinguished represents a 
very remarkable new genus, on which Mr. Baker has dwelt at some length in his report 
on the plants of the expedition. Тһе genus he has called Hndoterosora (Хо. 184]; Ше 
species he has been good enough to gratify me by naming after my friend the late William 
Hunter Campbell, LL.D., a man who, for very many reasons, but especially for his con- 
stant endeavours to forward the scientific interests of the colony, deserved so well of the 
people of Guiana. It is perhaps worthy of mention that this plant so closely resembles in 
outward appearance a form of an entirely different genus (Polypodium bifurcatum, L. 
[ Хо. 184 ex parte]) that I collected and dried it in mistake for that plant. Were it 
possible to conceive that this resemblance could be of any benefit to the genus Endo- 
terosora, it might be supposed that its very close resemblance to Polypodium bifurcatum 
was an instance of * mimicry.’ 
Above the jungle-belt comes the bush-belt. Here the shrubs, much fewer in number 
and so scattered over the ground as to leave wide intervening spaces, appeared to me 
generally of much the same species as in the lower belt. Here, however, as is not 
the case below, they are sufficiently distributed to be individually distinguishable. 
Among them the most prominent are a great number of species of Psychotria | Nos. 83, 
145, 185, 232], and a very remarkable yellow-flowered Melasma, M.? spathaceum, Oliver, 
n. вр. | No. 210], of which Professor Oliver writes that the specimens supplied him are 
too imperfect to afford means of final determination whether this should not be regarded 
as the type of a new genus distinct from Melasma; and, in great abundance, a Croton (C. 
surinamensi, Muell. Arg., aff. | №. 285]). Here, too, as below, but аз is not the case in 
the jungle-belt, occur a large number of plants of Brocchinia cordylinoides, still in its 
small Roraima, notin its larger Kaieteur form, as well as great quantities of the huge 
Stegolepis guianensis, Klotzsch. | No. 338], the Jris-like plants of which, being provided 
witha great abundance of slimy matter, made walking most difficult, in parts where they 
grew densely. The Brocchinia, too, grew in parts so densely that we had to walk, not on 
the ground, but on the crowns of the plants, which, as we crushed them with our feet, 
poured from the axils of their leaves the remarkably abundant water which they 
retain; and very cold water it was, over our already too cold feet. Nor must I omit to 
mention, though I propose afterward to sum up my observations on the Brocchinia and 
on the various species of Utricularia, that in this bush-belt a very few plants (I saw not 
more than three or four) of Utricularia Humboldtii, Schombk. | No. 43], of the dark 
Roraima form, were growing in the axils of the Brocchinia-leaves, as at the Kaieteur. 
Two other very interesting plants appeared to us first in this bush-belt, though we 
SECOND SERIES.—BOTANY, VOL. II. 28 
