550 FLORA NIGRITIANA. 
group of Diffusi, as well as one or two of Nees’ Brazilian 
species. 
5. Cyperus Haspan, Linn.—Kunth, Enum. 2. p. 34.—Sandy 
shores of the Nun, Vogel; Sierra Leone, Don; a common 
Tropical species in both hemispheres. 
6. Cyperus difformis, Linn.—Kunth, Enum. 2. p. 38.—Sierra 
Leone, Don; Asia, Africa and South Europe. 
7. Cyperus coloratus, Vahl, Enum. 2. p. 312.—Mariscus colo- 
ratus, Nees.—Kunth, Enum. 2. p. 126.—Accra and Cape 
Coast, Vogel, Don. 
This species is allied to C. spherocephalus, although the 
spieule, containing from five to eight flowers, are less com- 
pressed. The oval heads contain from twenty to thirty of these 
spiculæ, which are generally of a yellowish hue. The involucral 
leaves are narrow and slender, sometimes longer than the stem, 
but usually shorter. ; 
There are a few specimens, from Aguapim, of a variety (or 
perhaps species ?) with depressed globose heads, and the invo- 
lucral leaves broader and more numerous. 
8. Cyperus margaritaceus, Vahl.—Kunth, Enum. 2. p. 46.— 
Accra, Don, Ansell ; on the Quorra, Vogel. : 
This species is certainly closely allied to the East Indian 
C. niveus, but the habit of the plant is more tufted, as described 
by Thonning, without any, or scareely any, of the creeping 
rhizoma of C. niveus, and the spikelets are rather larger, 
although without so many flowers in each. 
9. Cyperus rotundus, Linn.—Kuwnth, Enum. 9. p. 58.—In the 
town of Sierra Leone, Vogel; common in nearly every part 
of the world. 
There is also, from Sierra Leone, a variety with shorter 
spikelets, more decidedly spicate, and the squamze not nearly 
so darkly coloured, which appears to come very near to the 
C. lucidulus, Kunth. 
10. Cyperus sphacelatus, Rottb.—Kunth, Enum. 2. p. 69.— 
Cape Coast, Don; Grand Bassa and Sierra Leone, Vogel, 
Ansell ; a South American species. 
The dark-purple spot on the margin of the squame is some- 
