110 Mr. Brown’s Observations on the... 
fers so widely, both in other points of structure and in habit, that 
there can be no question of the propriety of separating it, which 
may be done by the‘following character, and under the name of 
IsocAnPHA. 
Receptaculum conicum: paleis distinctis, conformibus : extimis in- 
volucrum constituentibus. Flosculi tubulosi, uniformes, herma- 
. phroditi. Anthere basi mutice. Stigmata appendice elongato, 
- hispidulo, acuto. Achenium prismaticum : pappo nullo. 
Herbæ (Americe æquinoctialis). Folia opposita. (vel alterna) in- | 
divisa. Capitula ovata, terminalia, terna (vel solitaria). Pales 
lanceolate. Corollz albide.  Anthere basi truncate. 
Oss. I have so constructed the generic character of Isocarpha as 
. to include Spilanthus atriplicifolius of Linneus, which, however, 
differs very remarkably from Calea oppositifolia in having alter- 
nate leaves and solitary capitula, as well as in the texture and 
form of its palex. ive ig ^ iin 
The pappus, consisting of three or four very minute aristæ, de- 
—s€ribed by Swartz* in Calea oppositifolia; 1 have not been.able 
-to observe in any of the specimens that I have examined. 
The third species, Calea Amellus, is probably the same plant as 
Bidens scandens, which Linneus described in Hortus Cliffortianus, 
but, having no specimen in his own collection, appears to have 
forgotten. The original specimen in Clifford’s Herbarium, now in 
the possession of Sir Joseph Banks, evidently belongs to the same 
species, and perhaps to the same individual, with a specimen in 
Miller’s collection, which Mr. Dryander compared, and consi- 
dered to agree with Calea Amellus of the Linnean Herbarium. 
The true synonym, therefore, of Calea Amellus is “Bidens suffruti- 
* In Obs. Bot. p. 302. 
cosus 
