[Vor. 5 
80 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
Pittonia 4:111. 1900; Rydb. Mem. N. Y. Bot. Gard. 1: 445. 
1900; Greenm. Monogr. Senecio, I. Teil, 24. 1901, and in Engl. 
Bot. Jahrb. 32:20. 1902; Rydb. Fl. Colo. 395. 1906; Daniels, 
Univ. Mo. Studies, Sci. Ser. 2 : 399 [251]. 1911. 
S. canus Torr. & Gray, Fl. N. Am. 2 : 443. 1843, in part, not 
Hook.; Gray, Syn. Fl. N. Am. 1? : 390. 1884, and ed. 2, 1886, 
in part, not Hook. ; Rydb. Contr. U. S. Nat. Herb. 3 : 510. 1896, 
in part, not Hook., i. e. as to No. 831. 
S. Laramiensis Nelson, Bull. Torr. Bot. Club 26 : 483. 1899. 
S. collinus Nelson, in Herb. 
S. canus Purshianus Nelson in Coulter & Nelson, Manual 
Cent. Roeky Mountains, 581. 1909; Fl. Intermountain States, 
175. 1912. 
A low cespitose herbaceous perennial, white-tomentose 
throughout, rarely glabrate; stems usually 1 to 2 dm., rarely 3, 
high, simple or branched; basal and lower stem-leaves mostly 
narrowly oblanceolate, occasionally oblong-obovate, including 
the petiole 2 to 12 cm. long, 3 to 15 mm. broad, rounded to 
obtuse at the apex, densely tomentose on both surfaces, occa- 
sionally somewhat glabrate ; upper stem-leaves similar, lanceo- 
late to linear, sessile, entire or somewhat dentate, often am- 
pliated into a lobed or semiamplexicaul base; inflorescence a 
terminal few to several-headed close or open cyme; heads 8 to 
10 mm. high, radiate; involucre campanulate, sparingly calyc- 
ulate, tomentulose to essentially glabrous; bracts of the in- 
volucre usually 13, occasionally fewer, linear-lanceolate, 5 to 
7 mm. long; ray-flowers about 8, rays yellow; disk-flowers com- 
monly 30 to 45; achenes glabrous. 
Distribution: South Dakota and northwestern Nebraska, 
west to Montana and Colorado. 
tain, but it may very well be that of Pursh. However, the plant is doubtless the 
specimen to which Nuttall referred, as “banks of the issouri"; furthermore, 
in all probability it is the plant cited by Pursh (Flora Americae Septentrionalis 
2: 528. , and ed. 2, 1816), under Cineraria integrifolia В. minor, as © 
