48o 



COMPOSITAE. 



[Vor,. III. 



13. Senecio compactus (A. Gray) Rydberg. 

 Western Squaw-weed. (Fig. 4045.) 



Senecio aureus var. compaclus A. Gray, Syn. Fl. i: Part 2, 



391. 1S84. 

 Senecio compaclus Rydberg, Mem. Torr. Club, 5: 342. 1893. 



Perennial; stem usually tufted, low, rather stout, 

 6'-i2' high, woolly at the base and in the lower axils, 

 or glabrous. Basal leaves linear-cuneatc, entire or 3- 

 toothed at the apex, \'-}/ long, 2"-3" wide, thick, 

 slender-petioled, the petioles commonly woolly-mar- 

 gined; lower stem-leaves often much larger and broader, 

 usually laciniate or pinnatifid, but sometimes similar 

 to the basal, the uppermost very small and sessile; 

 heads several, 8"-io" broad, short-pcduncled in a com- 

 pact corymb; rays 10-15; achenes hispidulous; pap- 

 pus white. 



On dry plains, Nebraska and Colorado to Texas. May- 



14. Senecio Robbinsii Oakes. Rob- 

 bins' Squaw-weed. (Fig. 4046). 



Senecio Robbinsii Oakes; Rushy, Bull. Torr. Club, 

 20: 19. 1893. 



Perennial, glabrous or very nearly so through- 

 out; stems slender, \°-2%,° high. Basal leaves 

 long-petioled, lanceolate, obtuse oracute at the 

 apex, cordate, subcordate or truncate at the 

 base, usually thin, 2'-4' long, yi'-i'^i' wide, 

 sharpl}' dentate; heads several or numerous, 

 slender-peduncled in an opeu corymb, S'^-lo" 

 broad; rays 6-12; achenes glabrous; pappus 

 ■white. 



In swamps and mountain meadows, northern 

 New Hampshire, Vermont and New York, and on 

 the summit of Roan Mountain, N. C. June-Sept. 



15. Senecio aureus L. Golden 

 Ragwort. Life-root. Swamp Squaw- 

 weed. (Fig. 4047.) 



Senecio aureus L. Sp. PI. 870. 1753. 



Perennial, glabrous or very nearly so 

 throughout; stems rather slender, solitary or 

 tufted, \°-2]i° high. Basal leaves cordate- 

 ovate or cordate-orbicular or reniform, cre- 

 nate-dentate, very obtuse and rounded, often 

 purplish, I '-6' long, with long slender peti- 

 oles; lower stem-leaves lanceolate or oblong, 

 usually laciniate, pinnatifid or lyrate, the 

 uppermost small, sessile, somewhat auricu- 

 late and clasping; heads several, 8"-io" 

 broad, 4"-5" high, slender-peduncled in 

 an open corymb; rays S-12, golden-yellow; 

 achenes glabrous; pappus white. 



In swamps and wet meadows, Newfoundland 

 to Florida, west to Ontario, Missouri and Texas. 

 Called also Grundy Swallow, False Valerian. 

 Root strong-scented. May-July. 

 Senecio aureus pauciflorus (Pursh) Britton. 

 Senecio pauciflorus Pursli, Fl. Am. Sept. 529. 1S14. 



Glabrous or with alittle woolin the axils of the lower leaves; stem rather stout, 6' -12' high; basal 

 leaves ovate to orbicular, about 'A' broad, cordate or subcordate at the base, crenate; stem-leaves 

 few, pinnatifid; heads i-io, short-peduncled, rather large, apparently always rayless. Perhaps a 

 distinct species. Newfoundland to the Canadian Rocky Mountains. 



