290 OBSERVATIONS ON THE NATURAL FAMILY 



alternd) indivisa. Capitiila ovata, terminalia, ierna (vel 



so/if aria). Paleae lanceolate. Corollas alhidce. Anthers 

 bast truncate 



Obs. I have so constructed the generic character of 

 Isocarpha as to include Spilanthm atriplic if alius of 

 Linnaeus, which, however, differs very remarkably from 

 Galea oppositifolia in having alternate leaves and soli- 

 tary capitula, as well as in the texture and form of its 

 paleae. 



The pappus, consisting of three or four very minute 

 aristae, described by Swartz 1 in Calea oppositifolia, I have 

 not been able to observe in any of the specimens that I have 

 examined. 



The third species, Galea Amelias, is probably the same 

 plant as Bidens scandens, which Linnaeus described in 

 Hortus Cliffortianus, but, having no specimen in his own 

 collection, appears to have forgotten. The original speci- 

 men 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 considered 

 to agree with Calea Amellus of the Linnean Herbarium. 

 The true synonym, therefore, of Calea Amellus is " Bidens 

 mi suffruticosus vimineus, foliis oblongo-ovatis oppositis, flo- 

 ribus comosis" of Browne f while Linnaeus has quoted and 

 even derived his specific name from the same author's 

 " Amellus ramosus, foliis remotis terminalibus, fulcris longis 

 divaricatis ;" 3 which, instead of belonging to Bidens 

 scandens, I believe, for the following reasons, to be Bidens 

 nivea. 1st, The figure in Burmann's Thesaurus Zeylani- 

 cus, 4 quoted by Browne for his plant, though belonging to 

 Lavenia erccta, is at the same time a good representation 

 of Bidens nivea, and very unlike Bidens scandens. 2dlv, 

 Browne's description in most respects very well agrees with 



1 In Obs. Bot. p. 302. 2 Browne, Jam. 317. 3 I. c. 



4 Eupat.oriophalacrum scrophularise aquaticae foliis oppositis, Burm. Thesaur. 

 Zeyl. p. 95, t. 42. 



