SOME ROCKY MOUNTAIN ASTERS. 223 
stagnant ponds and pools along the Humboldt River; a tall 
but not showy species, with few and remote, though excess- 
ively elongated cauline leaves, the subterranean parts lying 
just below the surface of the clayey mud. 
A. oXYLEPIS. Erect rigid stems, several from the root, 
simple up to the racemose or somewhat panicled inflores- 
cence, commonly 2 feet high, sparsely and minutely scab- 
rous below, the upper portion more notably and somewhat 
strigosely pubescent: lower leaves narrowly oblanceolate, 3 
inches long, entire, acutish; the upper linear, the bracts of 
the pedicels subulate-linear, all scaberulous at least mar- 
ginally: involueres 3 or 4 lines high, broadly turbinate or 
somewhat campanulate, their bracts distinctly imbricated 
in about 4 series, the short outer ones mostly herbaceous, 
the others with obovate green tips ending in a sharp seta- 
ceous point, all ciliate except the innermost, these being 
linear and with a more central herbaceous line: rays 15 to 
20, broad and rather short, pale-violet. 
On dry and rather sandy banks and terraces along the 
Humboldt River, below Palisade, Nevada, 24 Aug., 1896, 
collected by the writer. Species suggestive of the Califor- 
nian A. Menziesii by its narrow and racemose inflorescence, 
yet not intimately related to it, nor very obviously to any 
other. The setaceous-pointed involucral bracts recall the 
Machzrantheras; but the plant is otherwise far from form- 
ing even a connecting link between that genus and the 
Asters. 
To the foregoing species of the Rocky Mountains and 
regions adjacent, I append the following one peculiar to 
southern California. 
A. ENSATUS. ‘Tall, very leafy, rather closely panicled 
