OBSERVED DURING THE RORAIMA EXPEDITION. 257 
Before referring to the district of Roraima, I may mention that, if I may judge from 
the reports of the natives, and of the one or two white men who have been there, 
savannahs occur curiously like this very remarkable example at the Kaieteur (1) above 
Amailah fall on the Curiebrong river, a tributary of the Potaro, (2) above Orinidouie 
fall on the Ireng river, and (3) above a certain very large fall which exists (I have 
myself heard the roar of its waters) on the Potaro, about two days’ boat journey 
above the Kaieteur. In each of these places the large and not easily mistakable 
Brocchinia cordylinoides is credibly said to occur; and it seems highly probable that 
with this some of the other, but less conspicuous, plants of the Kaieteur occur also on 
these other savannahs. Іп short, it may very probably be that each of these reported 
fall-savannahs is a distinct area, parallel and similar in vegetation to the Kaieteur 
savannah and to Roraima. In passing it may also here be noted that apparently a Broc- 
chinia, similar to В. cordylinoides, occurs on the Organ Mountains, near Rio, in Brazil, 
reached by Gardner in 1837, and that in the axils of its leaves occurs a Utricularia (U. 
nelumbifolia, Gard.) which, to judge from Gardner’s passing descriptions, must be 
strikingly similar to U. Humboldtii as it occurs on the Kaieteur savannah. Possibly 
Fig. 9. 
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View of the south-east face of Roraima, showing the waterfall and ledge of ascent. 
the Organ Mountains, too, resemble in some of their vegetable features the Kaieteur 
savannah and Roraima *. 
* Gardner's description of the vegetation of the Organ Mountains (see his ‘Travels in Brazil, London, 1849, 
pp. 50-52, 402—403) reads extraordinarily like an account of the vegetation of Roraima. The height of the two 
elevations is about the same, but the Organ Mountains consist almost exclusively of granite, not, as Roraima does, of 
sandstone. 
SECOND SERIES.— BOTANY, VOL. II. 2R 
