Remarks on the Kaieteur Savannah. 245 
extraordinary species of Utricularia..Xo which I 
have given the name U. neliimbcefolia. Like most 
of its congeners, it is aquatic ; but what is most 
curious is, that, it is only to be found growing in the 
water which collects in the bottom of the leaves of a 
large Tillandsia that inhabits abundantly an arid rocky 
part of the mountains at an elevation of obout 5,000 feet 
above the level of the sea The leaves, which 
are peltate, measure upwards of three inches across, 
and the flowering stem, which is upwards of two feet 
long, bears numerous large purple flowers." Nearly all, 
if not absolutely all, the Utricularias bear little blad- 
ders plentifully, either on the floating leaves or on 
slender thread-like rhizomes which push through the 
water or soft mud in which they grow, a character which 
invests them with peculiar interest. DaRWIN and others 
have shown that these organs are contrived as traps to 
capture minute insects. In his " Insectiverous Plants," 
DARWIN particularly has described very minutely the cells 
and their functions in imprisoning and absorbing animal 
prey. In the purely aquatic species, the leaves 
of which float in the water and are cut into acicular 
filaments, the bladders are borne on the leaf; while 
those species which merely require moisture and 
grow usually in mud, and which possess variously 
shaped entire leaves, produce them on the slender 
rhizomes I have mentioned. To the latter class, 
though I found it in water, its roots, however, only 
submerged, U. Hwnboldtii belongs, and I gathered 
a mass of the threads bearing the singular blad- 
ders. 
HH 
