COMPOSITAE. Vo. III. 
21. Senecio Smallii Britton. Small’s Squaw- 
weed. Fig 4630. 
S. aureus var. angustifolius Britton, Mem. Torr. Club 
2: 39. 1890. Not S. angustifolius Willd. 1804. 
S. Smallii Britton, Mem. Torr. Club 4: 132. 1893. 
Similar to the preceding species but taller, grow- 
ing in large clumps; stem 14°-24° high, slender, 
densely and persistently floccose-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, 3’-6’ long, 
3’’-12” wide, at first tomentose, at length nearly 
glabrous; stem leaves several, deeply pinnatifid, or 
the lower lyrate, the uppermost very small; heads 
very numerous, 4”-5” broad, about 23” high, slen- 
der-peduncled, forming large corymbs; rays 8-10; 
achenes hispidulous; pappus white. 
In meadows and thickets, southeastern Pennsylva- 
\ nia to Florida and Alabama, May-June. 
22. Senecio densus Greene. Western Squaw- 
weed. Fig. 4631. 
Senecio aureus var. compactus A, Gray, Syn. Fl. 1: Part 2, 
391. 1884. 
Senecio compactus Rydberg, Mem. Torr. Club 5: 342, 1893. 
Not T. Kirk. 
Senecio densus Greene, Pittonia 4: 226. 1900. 
Perennial; stem usually tufted, low, rather stout, 
6-12’ high, woolly at the base and in the lower axils, 
or glabrous. Basal leaves linear-cuneate, entire or 
3-toothed at the apex, 1’-3’ 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, 8-10” broad, short-peduncled in a compact co- 
rymb; rays 10-15; achenes hispidulous; pappus white. 
On dry plains, Manitoba to Nebraska, Colorado and Texas. 
May-June. 
23. Senecio integérrimus Nutt. Entire- 
leaved Groundsel. Fig. 4632. 
Senecio integerrimus Nutt. Gen. 2: 165. 1818. 
Perennial, more or less pubescent when young, 
glabrous or nearly so when old; stem stout, 1°-4° 
high. Leaves entire, or sparingly denticulate, 
somewhat fleshy, the lower and basal ones oval 
or oblong, obtuse or obtusish at the apex, 3’-8’ 
long, 1-14’ wide, petioled, the upper linear or 
lanceolate, acute, the uppermost very small; heads 
numerous, corymbose, long-peduncled, 6’-10” 
broad; involucre nearly cylindric, 4-5” high, its 
principal bracts linear, acuminate, green, usually 
with a few subulate outer ones; rays 8-12, linear- 
oblong; achenes nearly glabrous; pappus white. 
Towa and Minnesota to Manitoba, Saskatchewan 
and Wyoming. June-July. 
Senecio ligens Richards., of northwestern North 
America, admitted in our first edition, is not defi- 
nitely known to occur within our area. 
