324 DESCRIPTIONS OF NEW SPECIES 



Hab. In the Rocky Mountain plains, near Lewis' River, common. Flowering in August. 0v 

 *albicaulis; stem densely and whitely tomentose ; perhaps a distinct species. Showy shrubs,- 

 three or four feet high, with numerous virgate branches, like the common Broom. Leaves one- 

 nerved, scarcely half a line wide, one and a half to two inches long. Flowers abundant, brilliant 

 yellow. ' 



Chrysothamnus dracuncuhides. Bigelowia dracunculoides, Decand., Vol. V. 

 p. 329. 



Hab. Rocky Mountain plains, near the banks of the Platte and Missouri. A shrub three to 

 five feet high, with a heavy, unpleasant, though somewhat aromatic odour. 



Chrysothamnus viscidijlorus. Crinitaria visddiflora, HooK. Flor. Bor. Am., 

 Vol. II., p. 24. With this plant I am unacquainted, but it agrees well with 

 the present genus. 



t Capitulum six to eight-flowered; stigma ligulate. 



Chrysothamnus lanceolatus; shrubby, nearly smooth; leaves linear-lanceolate, 

 acute, three-nerved, somewhat glutinous; capituli corymbosely clustered, six 

 to eight-flowered; stigma ligulate, pubescent at the apex. 



Hab. In tlie Rocky Mountains, toward the sources of the Platte, and on the banks of Lewis' 

 River of the Oregon. A modei;ate-sized shrub, with broader leaves than usual, one to one and a 

 half inches long, by three to four lines wide, slightly puberulous. Involucrum of about four series 

 of ovate, concave, acute scales. Stigma exserted, flat, with an ovate puberulous apex, something: 

 like that of the true Bigelowias. Pappus white, not abundant, scabrous. Florets pale yellow. 



CHRYSOMA. 



(NuTT., Journ. Acad. Nat. Sci. Philad., Vol. VII., p. 67.) 



Capitulum heterogamous, about five-flowered; liguli feminine, one to three^ 

 short and oval. Receptacle narrow, naked, alveolate, the central point ele- 

 vated. Involucrum imbricate, the scales carinate, the inner ones longer, 

 Achenium oblong, compressed, smooth, or somewhat pubescent. Pap- 

 pus simple, pilose, scabrous, the rays numerous. — Shrubby, suffruticose or 

 perennial? plants, with entire (or serrated) rigid, lanceolate leaves, opaque, 

 or pellucidly punctate. Flowers in fastigiate, corymbose clusters, wholly 

 yellow. — Allied to Bigehn)ia, but distinguished by the presence of liguli; to 

 Euthamia, but the liguli only about two; from Solidago in the same manner^ 

 and also by the whole habit. 



