[Vor. 3 
96 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
36. S. idahoensis Rydb. Bull. Torr. Bot. Club 27:185, 
pl. 6, fig. 5. 1900; Greenm. Monogr. Senecio, I. Teil, 24. 1901, 
and in Engl. Bot. Jahrb. 32:20. 1902. 
A rather stout herbaceous perennial 4 to 7 dm. high, 
glabrous or slightly white floccose-tomentulose in the axils of 
the leaves; stem branched from near the base, rather leafy in 
the lower portion, nearly naked towards the inflorescence, 
stramineous to somewhat purplish; leaves 2.5 to 14 em. long, 
1 to 6 em. broad, mostly pinnately parted into oblong or some- 
what cuneate subincised divisions with broad and deep round- 
ed sinuses; inflorescence terminating the stem and branches 
in a several to many-headed corymbose cyme ; heads discoid, 
10 to 12 mm. high; involucre eampanulate, ealyeulate; bracts 
of the involucre commonly 21, linear-lanceolate, 7 to 9 mm. 
long, acutish, more or less purplish-tipped; flowers numerous; 
achenes glabrous. 
Distribution: Idaho, northwest into British Columbia. 
Specimens examined: 
Idaho: in meadows at Granite Station, Kootenai Co., 30 
Aug., 1892, Sandberg, MacDougal & Heller 803 (Gray Herb. 
and Phil. Acad. Nat. Sci. Herb.), со-түРЕ. 
British Columbia: Griffin Lake, 6 July, 1889, Macoun, with- 
out number (Gray Herb.). 
A species very near the preceding from which, however, it 
differs in the branehing of the stem and by the large broad 
stem-leaves with eut divisions and deep rounded sinuses. 
37. S. debilis Nutt. in Trans. Am. Phil. бос. 7:408. 1841; 
Greenm. Monogr. Senecio, I. Teil, 24. 1901, and in Engl. Bot. 
Jahrb. 32:20. 1902; Blankenship in Mont. Agr. Coll. Sci. 
Studies 1:102. 1904. 
S. aureus var. discoideus Torr. & Gray, Fl. N. Am. 2:442. 
1843, in part, i. e., as to S. debilis Nutt. in synonymy. 
S. aureus var. borealis Gray, Syn. Fl. N. Am. 1:391. 1884, 
and ed. 2, 1886, in part. 
S. flavovirens Rydb. Bull. Torr. Bot. Club 27:181. 1900, in 
part, as to plant of Greene. | | 
