Remarks on the Kaieteur Savannah 249 
Though I purpose dealing in a future paper with the 
peculiar river-flora of the colony, there is one plant that 
prevails all the way from Pacatout to the rapids above 
the Kaieteur which I must notice because of a congener 
which I gathered on the savannah. It is a sedge with capi- 
tate crowded balls of white flowers on long stalks, and 
long narrow leaves. It grows submerged at the bot- 
tom of the river, and is only exposed when the water 
falls low, in the dry seasons, when it flowers. The 
savannah plant, of which I found but the individual 
I gathered, is more robust, with larger heads of flower 
and rigid serrated foliage. They are dioecious plants, 
and my specimens happen to be female of one species, 
and male of the other. Sir JOSEPH HOOKER has made 
them the types of a new genus which he has described 
for the Genera Plantaram, and placed, I believe, near 
Typha. 
The ferns of the open savannah belong to three closely 
allied genera, Lindsaya, Pteris and Blechnum, though on 
the shady borders several others appear. The Pteris of 
course is the cosmopolitan P. aquilina, and the Blech- 
num the prevalent B. serrulatiim. The Lindsayas are 
also the very common species, with one exception — the 
most beautiful of all the American Lindsayas. — L 
pendnla. 
Several other plants I had marked for notice, but 
these I must leave, all but one, and this only to settle 
a question which has been raised regarding it. On some 
of the trees a species of Codonanthe grows, with pendent 
limbs and white axillary bell-shaped flowers. Like several 
orchids in this country, it invariably grows in ant-nests, 
