é 
AND GENERA OF PLANTS. 309 
Has. Rocky Mountains, towards the Oregon. A very elegant and peculiar species, bearing 
some affinity with £. speciosum. Covered with a short, dense, pubescence, and with the margins 
of the leaves scabrous. Stem six to eight inches high. Corymb of three or four capituli. Pap- 
pus brownish, the exterior of white and slender palex. 
Erigeron * decumbens; somewhat glabrous below; root creeping; stem leafy, 
somewhat decumbent, many from the same root; leaves long and linear, acute, 
scabrous on the edge, attenuated below, the upper ones somewhat pubescent; 
flowers in a corymb; branchlets one-flowered, slender, and often leafy; sepals 
acuminate, hirsute; rays white, about fifty, twice as long as the disk; external 
pappus minute. 
Has. With the above, of which, at first glance, it appears a variety, but differs im the numerous 
rays and minute external pappus, as well as general habit. 
Erigeron * ochroleucum; subcespitose; stem pubescent above; radical leaves 
linear-sublanceolate, entire, crowded, smooth, those of the stem narrower, short, 
and sessile; stems one-flowered, scapoid or corymbose, and few flowered, the 
branchlets long; sepals tomentose, canescent, lanceolate, acute; rays numerous, 
about the length of the disk, (ochroleucous,) achenium pubescent. 
Has. Plains of the Oregon. August. Allied to the preceding, but with much larger flowers 
and rays; remarkable for the clustered root leaves, which, in the scapoid variety, resemble a tuft of 
pine leaves, ordinarily three to four inches long, by about a line wide, smooth and thick, much 
like those of an Armeria. Stem about a span, branchlets three to five, one-flowered, forming, in 
stout plants, an irregular corymb. Rays of the pappus, in both ray and disk, very obviously dou- 
ble, the external ring white and shining, internal, of about fifteen bristles. 
Erigeron * foliosum; rather hirsute and somewhat scabrous; stem simple, 
erect, terete, attenuated, the summit corymbose; leaves oblong-linear, sessile, 
entire, acute, crowded; sepals lanceolate, pubescent, acute, in about two series, 
and nearly equal; rays short, red, about thirty, achenia subhirsute. 
Has. Near St. Barbara, in Upper California. Flowering in May. A very remarkable species; 
the stem terete, full of leaves, one and a half to two inches long, and about two lines wide, diminishing 
in size with the attenuation of the stem. Sepals lanceolate. Pappus double, the outer small, the 
inner of many brownish rays. Stigma exserted, smooth, and nearly equally filiform in the ray; 
obliquely fruncate and slightly pubescent in the discal florets. The rays narrow, about the length 
of the involucrum, of a full purple red. This species appears to be considerably allied to Core- 
throgyne, but it has the achenium of Erigeron, somewhat prismatic, with three or four longitudi- 
nal brown lines or nerves; but the obtuse stigma appears to be an anomaly in the genus. ‘The as- 
pect of the plant is much that of an ster. (My specimens are too young to be satisfactory.) 
vil.—4 ¢ 
