FLORA NIGRITIANA. 437 
i A variety of Cotula’ anthemoides, Linn., is described from 
Senegal, and C. spheranthus, Link, probably not a true Cotula, 
is from the Congo River. One species of Helichrysum, H. glu- 
maceum, DC., has been found on the sea coast of Senegal, and 
another, apparently new, was gathered at Little Fish Bay, in 
15° S. lat., by Mr. Thwaites, but should probably be considered 
as a stray plant of the South African Flora. Three species of 
Gnaphalium have been found in Senegal; the cosmopolite G. 
luteo-album, Linn.; the common Egyptian G. Niliacum, Del. ; 
and the G. gracillimum, Perr., peculiar to Senegal. 
l. Gynura cernua, Benth.—Cremocephalum cernuum, Cass.— 
DC. Prod. 6. p. 298.— Cacalia uniflora, Schum. et Thonn. 
Beskr. p. 382.— Confluence of the Niger, Vogel.—An East 
Indian and Mauritius species. Ser 
Neither in these’ specimens, nor yet in cultivated ones from 
the Berlin Botanical Garden, can: I find any. florets entirely 
without anthers ; although the florets generally are. much more 
slender than in. most, Gynure, and those of the circumference 
more especially so, with their anthers probably sterile. As, 
Moreover, the G. aurantiaca, described below, is intermediate 
in habit, as well as in the thickness of the florets, between 
Cremocephalum and Gynura, it seems advisable to unite the 
two genera as proposed by Lessing. Moench’s name of Crasso- 
Cephalum has the. right of priority, but has been rejected as 
being compounded of a Latin and a Greek word ; and, of the two 
Proposed by Cassini, Cremocephalum has only been. given to 
one species, and is not applicable to the majority, whilst. Gy- 
nura is not only very expressive of the principal character of the 
Senus, but its rejection would necessitate the changing nearly 
five-and-twenty well established names. ap coy : 
2. Gynura polycephala, Benth. ; erecta, elata,’ foliis amplis 
lyrato-pinnatifidis, corymbi compositi ramis elongatis pleio- 
cephalis, capitulis breviter pedunculatis nutantibus, involucri 
Squamis interioribus circa 30, flosculis tenuibus (exteriorum 
antheris eassis).—Fernando Po, Vogel. ; : 
Herba 2-3-pedalis, minute puberula, caule striato, Folia i LE 
lata, semipedalia, membranacea, lobis inciso-dentatis acutis, 
