AND GENERA OF PLANTS. 333 
shorter than the rest.—Perennial, alpine, tuberous rooted plants, with some- 
what the habit of Arnica. Stem and lanceolate, serrated deaves smooth or 
lanugir nous, the former one or few-flowered, subracemose. © 
Homopappus *Inuloides; leaves lanceolate, subserrulate, softly lanuginous; 
stem one or few-flowered; sepals nearly equal, lanuginous; rays three-toothed, 
forty to fifty ; achenium subsericeous. 
Has. In the moist, open, grassy plains of the Rocky Mountains, towards the sources of the 
Platte. From three or four inches to a foot high. The root a dark, turbinate tabege clad, at the 
summit, with numerous fibrous, reticulated vestiges of former years’ growth. Leaves lanceolate, _ 
often sparingly cartilaginously serrulate, the primary ones smooth; the rest of the plant, as well as 
the involucrum, softly lanuginous with a long, white, loose, woolly pubescence. Stem leaves ses- 
sile, the lower much attenuated below. Capitulum hemispherical; the involucrum flat, and its 
sepals nearly equal. Rays oblong, three-toothed, shorter eben the disk, between forty and fifty; 
the discal florets one hundred and twenty, or more, small, tubular, shortly five ed; style ge- 
nerally included. Leaves two to four inches long, a quarter to half an inch mis 0 
= 
¢ Homopappus itor iflorus; stem and petioles deciduously hateiens Gowers 
racemose, branchlets one or few-flowered; leaves lanceolate, serrate, acute, al- 
“most coriaceous, the cauline linear, small and sessile; capituli hemispherical, 
pedicellate ; sepals oblong, in about two rows; rays twenty to twenty-five; 
achenium subsericeous. Donia lanceolata? Hoox., Vol. IL., p. 25. 
Haz. Prairies on the east and west side of the Rocky Mountains. From six inches to two pike 
high. Allied to the preceding, but much larger, the leaves at length, or from the first smooth, 
sharply and pungently serrulate; rays oblong, alight " gheslewrracce longer than the wide disk. 
almost flat, slightly pubescent, a little 1 rally, shorter than the pappus, which 
is af ‘Flowers about the size of a Daisy. Several stems from the same root, with leaves * 
sometimes so small as to appear almost as naked as Spee. Radical leaves four to five inches 
a long, attenuated into ‘Jong petioles. Root tap-shaped, crowned with numerous fibrous vestiges of ~ 
7 er leaves. Stem sometimes only three-flowered, sometimes with many one to two-flowered 
branches, from near the base to the summit; occasionally subdecumbent. 
PYRROCOMA. (Hookeér.) % 
> Pyrrocoma * radiata; smooth, leaves spathulate-obovate, cauline ovate-lan- 
ceolate, apiculate, serrate, amplexicaule, radical saci me entire, as well as 
the lower ones; flowers few, very large, penne axillary tonmian sub- 
vil.—4 1 
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