312 DESCRIPTIONS OF NEW SPECIES 



and acuminate, (not hirsute;) pappus longer than the linear, elongated, some- 

 what pubescent achenium. 



Hab. In the central chain of the Rocky Mountains, towards the sources of the Colorado of the 

 West, on the limits of perpetual snow, (lat. 42°.) Allied to E. alpinus, but with semiamplexi- 

 caule leaves, widest at the base. Pappus longer than the involucrum. Rays? .... A few fili- 

 form female florets outside the discal ones. Achenium long and linear, compressed, slightly silky. 



Erigeron * racemosum; lower leaves spathulate, smooth ; petioles ciliate ; se- 

 veral stems from one root, simple, racemose, peduncles or one-flowered branch- 

 lets usually elongated ; cauline leaves somewhat hirsute, sessile, long and linear, 

 subacute; sepals few, hirsute acute; rays very numerous, scarcely exserted be- 

 yond the pappus, (tubular styliferous florets none;) pappus more than twice 

 the length of the linear pubescent achenium. ^. *angustifolium; radical leaves 

 linear-spathulate, peduncles contracted. F,. glabratus, Hook. Flor. Bor. Am., 

 Vol. II., p. 18, not of Decandolle, (as a variety of E. alpinus.) Allied to the 

 E. elongatum of Ledebour. 



§. C^NOTUS. (Nutt.) 

 Erigeron canadense, Linn. 



Hab. In Oregon common; also in the Sandwich Islands at Ouau, or a variety of it. 



*ASTRANTHIUM. 



Capitulum many-flowered, heterogamous ; rays about one series, ligulate, neu- 

 ter, or sterile. Discal florets tubular, hermaphrodite, five-toothed. Recep- 

 tacle conic, alveolate. Involucrum hemispherical, the sepals lanceolate and 

 very acute, membranaceous on the margins, imbricated in two to three 

 series, and nearly equal. Achenia obovate, compressed, narrowed at 

 the apex, somewhat scabrous, without any prominent margin, and desti- 

 tute of pappus. — Divaricately branching annual plants; leaves alternate 

 spathulate, or linear, entire. Rays numerous, pale red. Flowers terminal, 

 fastigiate. 



Astranthium integrifolium. Q Bellis integrifolia, (Mich. Flor. Am., Vol. 

 II., p. 131. In Tennessee and Arkansa. This genus appears to be much 

 more allied, by the fruit, to Eclipta than to Bellis. 



