FLORA NIGRITIANA. 435 
a precedentibus facile distinguenda. Achenia pubescentia, 
apice calyculata, aristis minimis szepius vix conspicuis, squamis 
basilaribus brevissimis. 
hi Cryphiospermum repens, Beauy.— DO, Prod. 5. p. 497.— 
Fernando Po, Vogel; Guinea and Benin. 
l. Ambrosia Senegalensis, DC. Prod. 5. p. 525.—St. Thomas, 
Don; Senegal. 
l. Lipotriche Brownei, DC. Prod. 5. p. 544.—Buphthalmum 
scandens, Schum. et Thonn. Beskr. p. 892.—Cape Coast, 
Niger River, at Abóh, Fernando Po, Vogel ; Guinea Coast, 
Folia longiuscule petiolata, ovata, acuminata, irregulariter den- 
tata v. rarius angulato-lobata, basi hastata cordata v. rarius 
rotundata et szepius inzequalia, membranacea, plus minus his- 
pidula, 2-4 poll. longa. 
It is possible that there may be more than one species, but 
the specimens do not afford any positive characters to dis- 
tinguish them. It is a very different species from the South 
African Psathurocheta Drégei, although Schultz Bipontinus 
appears to be right in reducing the latter as a genus to Lipo- 
triche. 
1, Sclerocarpus Africanus, Jacq.—DC. Prod. 5. p. 566.—Cape 
Palmas, Ansell; Senegal and Guinea, and thence through 
. Nubia, Abyssinia and Arabia to East India. ; 
l. Bidens pilosa, Linn.— Webb, supra, p. 142.— B. abortiva, 
Schum. et Thonn. Beskr. p. 383.—Sierra Leone and Accra, 
Vogel; St. Thomas, Don.—A common American plant, 
Which has spread over a great part of Africa. 
Besides the varieties occasioned by the presence or absence of 
the ray, several of these specimens vary much in their leaves, 
Which are more decidedly pinnate than usual. : 
?. Bidens bipinnata, Linn.—DC. Prod. v. 5. p. 603.— Sierra 
Leone, Don. : 
Another common American plant, now found also in Senegal 
and in several parts of North Africa and South Europe. ym 
Specimen is a mere fragment, but appears to belong to this 
Species, 
rra 
