110 Mr. Brown's Observations on the 



fers so widely, both in other points of structure anil in habit, that 

 there can be no question of the propriety of separating it, wliich 

 may be done by the following character, and under the name of 



IsOCARPIIA. 



Receptaciilum conicum : paleis distinctis, conformibus : extimis in- 

 volucrum constituentibus. FlosciiU tubulosi, uniformes, herma- 

 phroditi. Antherce basi muticae. Stigmata appendice elongato, 

 hispidulo, acuto. Aclienium prismaticum : pappo nullo. 



Herbae (Americas aequinoctialis). Folia opposita {vel alterna) in- 

 divisa. Capitula ovata, ferminali't, tertia {vel soUfaria). Palete 

 lanccolatce. CoroUiE albidcc. Antherae basi truncatcc. 



Obs. I have so constructed the generic character of Isocarpha as 

 to include Spilanthus atriplicifolius of Linneus, which, however, 

 differs very remarkably from Galea oppositifolia in having alter- 

 nate leaves and solitary capitula, as well as in the texture and 

 form of its paleae. 



The pappus, consisting of three or four very minute aristae, de- 

 scribed by Swartz* in Galea oppositifolia, I have not been able 

 to observe in any of the specimens that I have examined. 



The third species. Galea 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 Galea Amellus of the Linnean Herbarium. 

 The true synonym, therefore, of Ccf/ea^/we//Ms is "Bidens suffruti- 



* In Obs. Bot. p. 302. 



cosus 



