1028 FLORA. 



13. Senecio Smallii Britton. Small's Squaw-weed. (I. F. f. 4044.) 



Similar to the preceding species but taller, growing in large clumps. Stem 

 4-7 dm. high, slender, densely and persistently fioccose-woolly at the base and in 

 the lower axils, or finally glabrate; basal leaves elongated-oblong or linear-oblong, 

 obtuse or acute, Long-petioled, crenate-dentate, at first tomentose, at length nearly 

 glabrous; stem-leaves several, deeply pinnatifid, or the lower lyrate; heads very 

 numerous, 8-10 mm. broad, slender-peduncled, forming large corymbs; rays 8-IO. 

 In meadows and thickets, Va. andN. Car. to Ga. and Ala. May-June. 



14. Senecio compactus (A. Gray) Rydb. Western Squaw-weed. 

 (I. F. f. 4045.) Perennial; stem usually tufted, low, rather stout, 15-30 cm. 

 high, woolly at the base and in the lower axils, or glabrous. Basal leaves linear- 

 cuneate, entire, or 3-toothed at the apex, 2-7 cm. long, 4-6 mm. wide, thick, 

 slender-petioled, the petioles com.i.only woolly-margined; 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, 16-20 mm. broad, 

 short-peduncled in a compact corymb; rays 10-15; achenes hispidulous. On dry 

 plains, Neb. and Colo, to Tex. May-June. 



15. Senecio Robbinsii Oakes. Robbins' Squaw- weed. (I. F. f. 4046.) 

 Perennial, glabrous or very nearly so throughout; stems slender, 3-7 dm. high. 

 Basal leaves long-petioled, lanceolate, obtuse or acute at the apex, cordate, sub- 

 cordate or truncate at the base, usually thin, 5-10 cm. long, 1-4 cm. wide, sharply 

 dentate; heads several or numerous, slender-peduncled in an open corymb, 

 16-20 mm. broad; rays 6-12; achenes glabrous. In swamps and mountain mead- 

 ows, northern N. H., Me., Vt. and N. Y., and on the summit of Roan Mountain, 

 N. Car. June-Sept. 



16. Senecio aureus L. Golden Ragwort. Life-root. Swamp Squaw- 

 weed. (I. F. f. 4047.) Perennial, glabrous or very nearly so throughout; stems 

 rather slender, solitary or tufted, 3-7 dm. high. Basal leaves cordate-ovate, 

 cordate-orbicular or reniform, crenate-dentate, very obtuse and rounded, often 

 purplish, 2-1 5 cm. long, with long slender petioles; lower stem-leaves lanceolate 

 or oblong, usually laciniate, pinnatifid or lyrate, somewhat auriculate and clasp- 

 ing; heads several, 16-20 mm. broad, 8-10 mm. high, slender-peduncled in an 

 open corymb; rays 8-12, golden yellow; achenes glabrous. In swamps and wet 

 meadows, Newf. to Fla., west to Ont., Mo. and Tex. May- July. 



Senecio aureus paucifl&rus (Pursh) Britton. Glabrous or with a little wool in the 

 axils of the lower leaves ; stem rather stout, 15-30 cm. high ; basal leaves ovate to orbicu- 

 lar, about 1 cm. broad, cordate or subcordate at the base, crenate; stem-leaves few, pin- 

 natifid; heads 1-10, short-peduncled, rather large, apparently always ray less; bracts very 

 narrow, acuminate, tinged with purple. Newf. to the Canadian Rocky Mts. and Wyo. 



Senecio aureus grdcilis (Pursh) Britton. Stem slender, 3-6 dm. high, the lowest axils 

 sometimes woolly. Basal leaves smaller than those of the type, cordate or subcordate; 

 heads numerous, rather small; rays conspicuous. In wet soil, R. I. to Mich., S. Dak., 

 Va. and Mo. 



17. Senecio spartioides Torr. & Gray. Linear-leaved Senecio. Like 

 the next in habit, but slender from a woody base, glabrous; leaves entire, narrowly 

 linear, 5-10 cm. long, 1-3 mm. wide; heads numerous; involucre about I cm. 

 high, 6-8 mm. broad, almost cylindraceous; rays about 7, golden yellow. Dry 

 plains, Neb. to Wyo., south to Tex. and Ariz. July-Sept. \S. Douglasii A. Gray 

 in part.] 



18. Senecio Fremontii (T. & G.) Rydb. Narrow-lobed Senecio. (I. F. 

 f. 4048 as S. Douglasii.) Woody at the base, usually branched, sometimes shrubby, 

 glabrous or nearly so, leafy, 3-18 dm. high. Leaves sessile, or the lowest petioled, 

 thick, 3-7 cm. long, pinnately parted into 3-9 linear or filiform entire segments, 

 or the upper entire; heads corymbose- at the ends of the branches, 1-2 cm. broad, 

 slender-peduncled; involucre cylindric or becoming campanulate, 10-15 mm. high, 

 its bracts linear, acute or acuminate, usually with some subulate exterior ones; 

 rays 8-15, achenes canescent. Plains, in dry soil, Neli. to Tex. and Mex. June- 

 Sej t. [S. /i/ij 'alius var. Fremontii, T. & G. ; S. Riddellii T. & G. ; S. Douglasii 

 A. Gray, in part.] 



19. Senecio palustris (L.) Hook. Marsh Fleawort. Pale Ragwort. 

 Marsh Groundsel. (I. F. f. 4049.) Annual or biennial, pubescent or glabrate; 



