OF PLANTS CALLED COMPOSITE. 289 



Frutices (America? sequinoctialis,) pubescentes, scabri. 

 Folia opposita, indivisa. Capitula 1 corgmbosa, v. terminalia, 

 v. axillaria. Involucri subovati foliola nervosa, obtusa. 

 Palese receptaculi convexi distinctce, figura et textura fere 

 involucri. Corolla? luteo-purpurece (Swartz), glabra, la- 

 ciniis dinerviis. Achenium subcylindraceum v. obsolete 

 angidatum, glabrwm v. pubescens 9 callo baseos subobliauo. 

 Pappus persistans albus, nitens ; radiis simplici serie 

 subulalis, indivisis, superne denticidatis. 



Obs. In Sir Joseph Banks's Herbarium there are two 

 plants very nearly related to Calea, differing from it 

 merely in having a radius of ligular female florets. If 

 this difference be considered sufficient to constitute a 

 genus, it may be named Caleacte. The first of these 

 plants (C. urticifolia), with nearly ovate-acute crenated 

 leaves, found by Houston near Vera Cruz, is Solidago 

 urticcefolia of Miller, by whom it appears to have been 

 cultivated. The second, with deeply lobed or pinnatifid 

 leaves (C. pinnatifidd) , was lately sent from Brazil by 

 Mr. Sellow. 



The second Linnean species, Calea oppositifolia, has very 

 little affinity to the first. In attending merely to the 

 technical character of Santolina, it might be referred to 

 that genus; but it differs so widely, both in other points of cno 

 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 



Isocarpha. 



Beceptaculum conicum : paleis distinctis, conformibns : 

 extimis involucrum constituentibus. Flosculi tubulosi, 

 uniformes, hermaphroditi. Anther ce basi mutica?. Stig- 

 mata appendice elongato, hispidulo, acuto. Achenium 

 prismaticum : pappo nullo. 



Herbse (America? aequinoctialis) . Folia opposita (vel 



1 Corolla communis, Linn. 



19 



