120 
Mr. Brown’s Observations on the 
irritability of the style has been lately described by Mr. Ker in 
certain species of Arctotis*. 
The second species added to the genus by Willdenow is Calea 
lobata, which Linneus, from the general appearance, I conclude, 
rather than from actual examination of the plant in Clifford’s Her¬ 
barium, had referred to Conyza; and having no specimen in his 
own Herbarium, the twofold error of supposing it to belong to 
Polygamia superflua, and to have a naked receptacle, remained 
uncorrected in all his subsequent works. 
Its real structure was first pointed out by Professor Swartz, who 
consequently referred it to Calea , with the character of which it 
exactly agrees. This alteration is adopted in the first edition of 
Hortus Kewensis, where the generic character of Calea is modi¬ 
fied, to admit those species that are without pappus; and by 
Gaertner, who limits the genus to C. lobata and C. jamaicensis , as 
the only species that correspond with the Linnean character. But 
as C. jamaicensis, the original species of Calea , has been shown to 
have a pappus of a very different kind, it becomes necessary to 
give a new name to Calea lobata; and some additions being also 
wanting to its generic character, I propose the following, and the 
name of 
Neuroltena. 
Calea Gccrt. 
Involucrum imbricatum, foliaceum. Receptacalum paleaceum, 
planiusculum. Flosculi tubulosi, uniformes, hermaphroditi. An¬ 
ther# inclusae, basi muticae (emarginatae). Stigmata acuta, re- 
curva. Pappus capillaris, denticulatus, persistens. 
Trutex (Americae aequinoctialis) erectus. Folia alterna , indivisa , 
et lobata. Corymbus terminalis , compositus. Involucri subovati fo- 
* Botanical Register, i. 34. 
liola 
