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FLORA NIGRITIANA: 549 
Brazilian specimens described by Martitts. They resemble in 
every respect the common eastern X. Indica, except in the oval 
or oblong Opaque spots on the otherwise shining scales of the 
mvoluere. Kunth describes a X. platicaulis, Poir., from the 
Mauritius and S. East Africa with the same opaque spot, but 
that appears to be a much smaller plant. 
: The only species hitherto published as West Tropical African 
is the X. filiformis, Lam., from Sierra Leone. 
CXVI. CYPERACEÆ®. 
l. Cyperus polystachyus, Rottb.—Kunth. Enum. 2. p. 13.— 
- Cape Palmas, Ansell ; Sierra Leone and on the Nun River, 
Vogel; a common species in Africa, Asia and America, found 
also in South Europe. 
2. Cyperus aurantiacus, Humb. et Kunth.—Kunth, Enum. 2. 
«D. 20.— C. amabilis, Vahl, Enum. 2. p. 818 ?—C. lepidus, 
Hochst. in Kotsch. Pl. exs. Herb. Nub. n. 139.—On the 
Quorra, at Patteh, Vogel; Nubia and Tropical America. 
An annual, varying from three to six or seven inches in 
height. The specimens agree precisely with Schomburgk's 
1.221, from Guiana, with Moritzi’s n. 1571, from Columbia, 
and with Kotschy’s, from Nubia; as well as with Kunth’s 
Character. Vahl’s description appears to apply to the same 
Species, although the spikelets in our plant are more numerous, 
-and the squamæ often produced into a very short point. It is 
a tristylous species, allied to, but distinct from the E. Indian 
C. castaneus. 
3. Cyperus aristatus, Rottb.— Kunth, Enum. 2. p. 23.—In the 
town of Acera, Vogel; Senegal South Africa and East 
India; also North America and the Galapagos, if I am 
right in considering the C. inflexus, Muhl., as the same 
Species, and, I believe, in Brazil. 
4. Cyperus elegans, Linn.— Kunth, Enum. 2. p. 28.— Fernando 
Po, Vogel ; Tropical America, Africa and Asia. 
is appears to be a widely spread species, to which are 
Probably referrible C. mestus, Kunth, and some others of the 
