[Vor. 3 
178 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
S. streptanthifolius Greene, Erythea 3:23. 1895; Howell, 
Fl. Northwest Am. 1:375. 1900. 
Lower leaves suborbicular, obovate or oblong-obovate, 
somewhat glaucous. 
Distribution: southeastern Idaho and northwestern Wy- 
oming. 
Specimens examined: 
Idaho: Beaver Cañon, 1 Aug., 1889, E. L. Greene (Greene 
Herb.), түре; Beaver Cañon, 29 July, 1889, E. L. Greene (U. 
S. Nat. Herb.) ; northwestern Wyoming, 22 Aug., 1893, Rose 
243 (U. S. Nat. Herb.). 
76. S. acutidens Rydb. Bull. Torr. Bot. Club 27:180, pl. 5, 
fig. 2. 1900; Greenm. Monogr. Senecio, I. Teil, 23. 1901, and in 
Engl. Bot. Jahrb. 32:19. 1902. 
S. cymbalarioides Coulter & Nelson, Manual Cent. Rocky 
Mountains 582. 1909, in part, as to S. acutidens in synonymy; 
Wooton & Standley, Contr. U. S. Nat. Herb. 19:747. 1915, as to 
specimen cited. 
An herbaceous perennial, glabrous or slightly floccose- 
tomentulose in the early stages and soon glabrate except in 
the axils of the leaves; stems 1.5 to 2.5 dm. high, erect, more 
or less tufted, simple or branched; lower leaves obovate to 
oblong-oblanceolate, including the petiole 3 to 12 em. long, 
.9 to 1.5 em. broad, dentate towards the apex, entire towards 
the base and gradually narrowed into the petiole, thick and 
firm in texture, often bluish green and somewhat glaucous; 
stem-leaves oblanceolate and rather sparingly dentate to 
lance-attenuate and entire; inflorescence a terminal few to 
several-headed corymbose суше; heads 8 to 10 mm. high, 
radiate; involuere sparingly calyculate; ray-flowers 8 to 10, 
rays yellow; disk-flowers numerous; achenes glabrous or 
rarely slightly hirtellous along the angles. 
Distribution: Wyoming to New Mexico. 
Specimens examined: 
Wyoming: Union Pass, Wind River Range, 10 Aug., 1894, 
4. Nelson 858 (N. Y. Bot. Gard. Herb., Gray Herb., U. 8. 
