1480 CARDUACEAE 
\ 
pinnatifid: heads typically few, not crowded: involucre 5-6 mm. long; bracts 
glabrous or nearly so: ligules of the ray mostly 7-9 mm . long: ios 2.0—3 
. long.—Stony woods, dry pastures, hillsides, ud meadows, various prov- 
Noe Ga. to Tex., B. C., Ont., and Newf.—Spr.— —Senecio Earlei Small 
seems to be a more robust and pore leaved form ofi this species in the south- 
ern part of its range. 
10. S.Smallii Britton. Plant 3-6 dm. tall: blades of x basalleaves narrowly 
lanceolate to E s serrate, incised-serrate, or incised or pinnatifid near 
the base: heads typically numerous and often crowded: oie 4—5 mm. long; 
braets glabr us or nearly so: ligules of the ray mostly 4-5 mm. long: achenes 
1.5- ong.—Sandy fields, ditches, pinewoods, and dry woods, various 
mur V "ls. to Miss., Tenn., 'and Pa. hs 
11. S. tomentosus Miehx. Plant 2-7 dm. tall, the dee bL and per- 
sistently floccose-tomentose: blades of the bas al leaves angular-ovate to 
broadly pon a triangular lanceolate, or ovate, cren TA or crenate-serrate, 
abruptly n rrowed o truneate at the base: heads few, at least relatively so, 
ultimately iot er RAN involuere ue mm. long; braets densely white- -pubescent 
when young: ligules of the ray 5-8 mm. long: achene 2-2.5 m m. long.—Sandy 
fields, banks, roadsides, and prairies, Coastal Plain iud adj. provinces, Fla. to 
Tex., Ark., and N. J —Spr. 
12. S. n. Britton. Plant similar to S. E in habit, but nearly 
glabrous up t inflorescence where the peduncles are arachnoid: blades of 
the basal AE pm triangular-ovate, or mida iun dentate, 
or ere aei often inequilatera alat the abruptly pida or truncate base; 
heads r r few, not crowded, except when young: involucre 6-7 mm. long: 
braets slightly arachnoid or nea arly glabrous: ligules 5-8 mm. long: achene 
about 2.5 mm. long.—Moist pine woods, Coastal Plain, Ala.—Spr. 
13. S. Me yaoi bu Plant 3-6 dm. tall: blades of the basal leaves 
bipinnatifid: involuc mm. long; braets linear: ligules 5-6 mm. long.— 
n and dry Soil, "Blue Ridge to Appalachian Plateau, Ala. to N. C.—Spr.- 
14. S. Millefolium T. & G. Plant 3-7 dm. tall: blades of the basal leaves 
bipinn ul dissected into narrowly linear segments: involucre 5-6 mm. long; 
braets linear pe usually lanceolate at the tip: ligules 2-4 mm. long: disk- 
corollas 4 mm. long.—Cliffs, Blue Ridge, S. C. and N. C—Sum. 
23. ARCTIUM L. Biennial, coarse herbs. Leaves alternate: blades 
often ample, mainly entire or repand. Heads solitary in the axils or clustered; 
not conspicuous. Involucre with many nar- "77 
row braets, eaeh hooked at the tip.  Fila- 
ments glabrous. Pappus of short, rigid or 
seale-like bristles.—About 6 species, Eura- 
sian. 
1. A. us Schk. Plant 4-16 dm. tall, 
often ae branched: leaf- sap ovate, 
those of the lower cauline leaves 2—4.5 
long, all undulate or shallowly oe 
cuneate to elliptic. inn 5-6 mm. long or 
rarely smaller. — (BURDOCK. BEGGAR’S- 
BUTTONS.  CLOTBUR.) — Waste-places, cult. 
grounds, and roadsides throughout U. S. and S Can. Nat. of Eu.—Sum.-fall. 
