312 DESCRIPTIONS OF NEW SPECIES 
and acuminate, (not hirsute;) pappus longer than the linear, elongated, some- — 
what pubescent achenium. 
Has. 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 Z. alpinus, but with semiamplexi- 
eaule 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. £8. *angustifolium; radical leaves 
linear-spathulate, peduncles contracted. LE. glabratus, Hoox. Flor. Bor. Am., 
Vol. IL, p. 18, not of Decandolle, (as a variety of E. alpinus.) Allied to the 
E. elongatum of Ledebour. 
§. Canotus. (Nutt.) 
Erigeron canadense, Linn. 
Has. In Oregon common; also in the Sandwich Islands at Ouan, 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. © Bellis integrifolia, (Micu. Flor. Am., Vol. 
II., p. 131. In Tennessee and Arkansa. This genus appears to be much 
more allied, by the fruit, to Echpta than to Bellis. 
