430 FLORA NIGRITIANA. 
(Prod. 5. p. 86) as proposed by Schultz Bipontinus, (Linnea 
18. p. 594) ; for the characters, by which he afterwards (Linnea 
20. p. 515) thought that the East Indian one might be distin- 
tinguished, do not hold good. The African specimens before 
me come nearest to the form described by De Candolle as 
E. Martii, which is chiefly Brazilian, but is also found in other 
parts of the world. 
1. Ageratum conyzoides, Linn.—As common along the coast, 
from Senegal to Benin, Vogel, Don, and others, as it is in 
other parts of Africa, Asia and America. 
l. Adenostemma Perrottetii, DC., Prod. 5. p. 110?—8t. 
Thomas, Don. 
There are two specimens, the one nearly smooth, the other 
more hairy, both belonging apparently to the Senegambian species 
described by De Candolle, and probably not really distinct from 
the common West Indian 4. Swartzii. 
1. Mikania chenopodiifolia, Willd. DC. Prod. 5. p. 201— 
Common from Senegal to Fernando Po, Vogel, Don, and 
others. i 
This plant is sometimes quite smooth, in other specimens 
the upper surface of the leaves and the angles of the branches 
are rough, with short hairs, and the inflorescence has more oF 
less of glandular pubescence. It is closely allied, both to " 
common American M. scandens and to the East Indian M. vo- 
lubilis, and all three may be varieties of one species. 
1. Erigeron persicefolium, Benth. ; herbaceum, elatum, glabrum 
v. apice puberulum, foliis sessilibus subamplexicaulibus elon- 
gato-lanceolatis acutissimis remote denticulatis, corymbo com- 
. 
- 
posito polycephalo, involueri squamis linearibus acutis marg. 
natis discum :equantibus, floribus foemineis numerosissimi? 
disco brevioribus extimis tenuissime ligulatis, interiori - 
truncatis subdentatis, centralibus paucis hermaphroditis. — 
St. Thomas, Don. 
Caulis bipedalis, in specimine simplex. Folia 3-5 poll 
longa, versus medium 5-8 lin. lata, denticulis minutis T€" 
motis v. raro nullis. Ramus apice confertim corymbosus, 
ramulis corymbi exterioribus gracilibus, pedunculis ultims 
