FLORA NIGRITIANA. 569 
without any label ; probably from cultivated plants. There are 
not either any Hordeacee known to be indigenous, and it does 
not appear that any of our common grains are cultivated 
there. 
l. Rottbóllia exaltata, Linn.—Kunth, Enum. 1. p. 466.—Fer- 
nando Po, and common on the banks of the Quorra, where 
it reaches the height of from 5 to 10 feet, with the leaf- 
sheaths covered with stinging hairs, Vogel; East India and 
Australia. 
1. Manisuris granularis, Sw.—Kunth, Enum. 1. p. 469.—On 
the Quorra, Vogel, Ansell; common in most of the warmer 
regions of the globe. 
l. Perotis latifolia, Ait.—Kunth, Enum. 1. p. 470.—On the 
Quorra at Pandiaki, Ansell; South Africa and East India to 
Japan. 
These are luxuriant specimens, with larger and more rigid 
leaves than usual, the raceme full 9 inches long, with rather 
small crowded flowers. The plant varies in all these respects, 
and the P. hordeiformis, N. ab E., cannot well be distinguished 
as à species. 
l. Saccharum spontaneum, Linn.—Kunth, Enum. l. p. 475. 
et pars. 2. p. 385.—S. punctatum, Schum. et Thonn. Beskr. 
D. 46.— On the Quorra, Vogel; Guinea and East India. 
This agrees with the descriptions of Roxburgh and of Kunth, 
as well as with some of our East Indian specimens. It grows, 
according to Vogel, to the height of 6 or 8 fect, the leaves are 
Very rigid, narrow, and nearly plane, with a very broad mid-rib ; 
the axis of the panicle very villous, as in S. Aigyptiacum, but 
the flowers of the latter are nearly twice as large. In both 
species the outer glume is usually two-nerved, but not always 
80, the mid-rib being often more or less visible or prominent. 
The true Sugar Cane, Saccharum officinarum, Linn., 18 
cultivated in Guinea. 
l. Imperata arundinacea, Cyr.— Kunth, Enum. 1. p. Ae 
I. Thunbergii, N. ab E. Gram. Afr. Austr. p. 89.— Sierra 
Leone, Don; Senegal, South Europe and throughout Africa, 
East India to North Australia. 
