AND GENERA OF PLANTS. 445 
* ERYTHREMIA. 
Capitulum about ten-flowered. Involucrum subcylindric, caliculate; sepals 
about eight, in a single series. Receptacle naked. Achenium short, sub- 
cylindric, erostrate, ten?-striate or ten-ribbed. Pappus exceedingly copious 
and long, barbellate towards the base, nearly simple, and more slender above. 
Style and branches of the stigma exserted beyond the anthers, very hirsute, 
the stigmas acuminate, sublanceolate or clavellate.—Perennials, with low, 
few-flowered stems, naked or foliaceous towards the base, with long, linear, 
fleshy, entire leaves, almost all tadical. Capituli with rose-red flowers. Al- 
lied to Lygodesmia, but with a different achenium and pappus, and a more 
compound capitulum; also to Nadalus, but with a widely different habit and 
different achenium.—(The name is derived from epvOpyuc, redness; in allu- 
sion to the colour of the flowers.) 
Erythremia * grandiflora; leaves long and linear, acuminate; stem scarcely - 
exserted beyond the leaves, forked, with two or three capituli. 
Has. In the Rocky Mountain range, on the borders of the Platte. Root large, tuberous or tap- 
shaped and descending; very milky and bitter. Leaves chiefly radical, or at the base of the stem, _ 
linear, entire and acuminate, glaucous or pale green, two to four inches long, half a line to a line 
wide, usually curved or spreading, of a thick and fleshy consistence. Stem three or four from the 
root crown, forked, having two or three capituli. Stem three to seven inches high: a large leaf 
at the first division, on the upper part of the stem shorter, or mere bractes as they approach the 
flower. -Caliculum of about five, very short, ovate, lacerately ciliate leaflets, Involucrum of eight 
equal, linear-oblong, flat leaves, pubescent at the summits, somewhat obtuse, membranous on the 
margin, with a single faint nerve in the centre, Florets about ten, fine rose-red, and exserted 
beyond the involucrum, about its length, flat and five-toothed at the extremity. Style and stigmas 
very much exserted, and very hirsute; no awns or obscure ones at the base of the anthers. Pappus 
yellowish-white, in a crowded and nume series, twice or three times the length of the achenium, 
the rays thicker and more serrated or barbellated towards the base. Receptacle punctate. The 
ripe fruit is unknown, but it appears to have about double the number of ribs there are in Lygo- 
desmia. In Lygodesmia juncea, the stigmas only are exsertéed and slenderly filiform, and the — 
pappus appears almost perfectly simple, or without any serratures. In both these genera, as well fi 
‘as in Nabalus, the anthers are bisetose at base. 
vil.—5 M 
