FLORA NIGRITIANA. 433 
P. Senegalensis, ramulo sub capitulo incrassato. Achenia quam 
in P. Senegalensi breviora, striata, leviter hirtella ; pappus 
interior siccitate ecerulescens; exterioris pale hyaline, ultra 
medium in setas tenuissimas fisse. Anthere longe bicau- 
date. Stylus exsertus, lobis apice valde dilatatis fere clavatis. 
The Pegolettia Senegalensis, DC., extends from Senegal 
through Nubia, to Arabia, if, as it appears to me, the KwAnia 
Arabica, Hochst. (DC. Prod. 7. p. 267), be really the same 
species. The Ceruana Senegalensis, DC., is only known from 
Senegal. 
l. Eclipta erecta, Linn., DC. Prod. 5. p. 490.— Senegal to 
Benin. As common a weed in Africa as in Asia and 
America. 
E Coronocarpus Prieureanus, Benth. ; foliis subsessilibus ob- 
longo-lanceolatis capitulo ovoideo brevioribus, ligulis circa 8. 
—Blainvillea Prieureana, DC. Prod. 5. p. 492.—On the 
Quorra, at Attah, Vogel; Senegal. : 
The specimens are in a half-rotten state, but agree with De 
Candolle’s character. They closely resemble also the Corono- 
carpus Kotschyi, (Dipterotheca Kotschyi, Schultz. Bip.), from 
Nubia, but are more hairy, the leaves are narrower, the heads 
of flowers rather smaller, the ligule ‘much smaller, and yellow 
muto (not purple), and the achenia much shorter and less 
The genus Coronocarpus, Schum. et Thonn., accidentally 
overlooked by De Candolle and subsequent botanists, differs 
from Blainvillea chiefly in the sterility of the ligule or florets of 
the ray. It is evidently identical with Dipterotheca, Schultz 
Bip., and possibly also with Harpephora, of Endlicher. "The 
minute appendages at the base of the achenia, on which Schultz 
Bipontinus proposes to establish a distinct subtribe, are eunous, 
but probably of less importance than he seems to attach to 
them. ‘Traces of them may be seen in some of the Asiatic 
Species of Blainvillea ; and, probably, in other Composite with 
very paleaceous receptacles they will be found, if carefully 
Sought for. Taking the flower-head as a contracted spike, the 
FF 
