AND GENERA OF PLANTS. 427 



KRIGIA. (Schreber.) 



Krigia occidentalis, (Nutt. in Journ. Acad. Nat. Sci. Philad., Vol. VII., p. 

 104;) leaves mostly lyrate, with slender segments; scapes glandularly pubes- 

 cent; sepals five to eight, lanceolate, carinate, somewhat obtuse; setae of the 

 pappus scarcely the length of the scales. 



Hab. Arkansa. Annual, as usual, and so similar to K. virginica, that I at first considered it 

 the same ; but the specific characters given are constant, and prove it very distinct. In K. virginica, 

 the sepals are flat, linear-lanceolate, and acuminate, and the awns of the achenium are several times 

 longer than the scales. 



Krigia dichotoma, (Nutt.) is nothing more than an advanced state of growth 

 of K. virginica. 



Subtribe vi. Scorzonere^. (Lessing.) 



*STEPHANOMERIA. 



Capitulum subcylindric, three or five-flowered. Involucrum three to five- 

 leaved; sepals linear-oblong, imbricate, one-nerved, with a caliculum of a 

 few shortish, unequal scales. Receptacle naked, scrobiculate. Achenium 

 oblong, obtusely five-ribbed or pentangular, transversely rugose, the summit 

 truncated. Pappus of ten to twenty-four thick, closely plumose rays, sepa- 

 rate, or connected together at the base by pairs. — Perennial, tuberous-rooted, 

 or annual, herbaceous plants, very much branched, above nearly leafless, the 

 lower leaves linear, or runcinate-pinnatifid. Capituli terminal; the flowers 

 pale rose-red. Nearly allied, both in habit and character, to Lygodesmia, 

 but differing in the pappus and achenium. 



Stephanomeria minor; %, smooth, and much branched from the base, 

 branches obscurely striate; leaves entire, linear-subulate; achenium subrugu- 

 lose, with five obtuse, carinated ribs; pappus of twenty to twenty-four rays. 

 Lygodesmia minor, Hook. Flor. Bor. Am., Vol. L, p. 295, tab. 103, fig. A. 



Hab. On the plains and hills of the Oregon. About a foot high, flowering only at the summit; 

 flowers small, pale rose-red; caliculum of about five, small, ovate scales. Pappus white. 



Stephanomeria * heterophylla; % , radical leaves oblong, runcinately toothed 

 or pinnatifid, subhirsute, as well as the lower part of the stem; upper leaves 



