OBSERVED DURING THE KORAIMA EXPEDITION. 



257 



Before referring to the district of lloraima, 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 t li is very remarkable example at the Kaieteur (1) above 

 Amailah fall on the Guriebrong 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 tin; Potaro, about two days' boat journey 

 above the Kaieteur. In each of these places the large and not easily mistakable 

 JBrocchinia cordylinoides is credibly said to occur; and it seems highly probable that 

 with this some of the other, hut less conspicuous, plants of the Kaieteur occur also on 

 these other savannahs. In 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 Rorairaa. In passing it may also here be noted that apparently a Broc- 

 chinia, similar to B. 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. 

 nelwmbifolia, Gard.) which, to judge from Gardner's passing descriptions, must be 

 strikingly similar to U. Humboldlii as it occurs on the Kaieteur savannah. Possibly 



Fig. 2. 



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View of the south-cast face of lloraima, showing the waterfall and ledge of ascent. 



the Organ Mountains, too, resemble in some of their vegetable features the Kaieteur 

 savannah and lloraima *. 



* (iardner'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. 



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