1416 CARDUACEAE 
e base or rarely narrowed, “pubescent 
ppe 
tuse, ciliolate: lig of th y yello 
eee 3-3.5 mm. long: 
achene 6 mm tomentosa 
to 
Nutt. ]—Sandy Pi oui Plain, Fla. 
Ala., and N. C. 
2. B. humilis Small. Plant 1-2 dm. tall, 
tomentose: leaf-blades elliptic to ovate, 3— 8 
d unevenly 
ss lyr 
? 
pinnatifid nea e base, or em 
erely cordate: scape simple or cory ely 
branched, the heads thus -o or several together: involucre 1.5-2 cm 
bracts ees or lanceolate to ovate or orbicular, oe soft- pubescent: ligules 
of the ray 1.5-2 cm. long: done obovate, 5- 6 n m. long, woolly.—Pinelands 
and sandy woods, Fla. 
3. B. subacaulis pus Plant 1-5 dm. tall, hispidulous: leaf-blades deeply 
sinuate-pinnatifid or lyrate-pinnatifid, elliptie to oblaneeolate, 4—12 cm. long, 
the lobes obtuse, entire or toothed: involuere about 2 em. broa à: braets elliptie 
Or El spatulate t o obovate and gene obtuse, ciliolate: ligules of the ray 
1- . lon isk-eorollas 3-3.5 mm. long: ac chene elliptie or nearly so, 5-6 
mm. end ciliclate. —Dry pinelands, Fla. 
62. PARTHENIUM L. Coarse herbs, or pon ed pale-pubescent. 
Leaves alternate: blades toothed, pinnatifid, or diss ; eads inconspicu- 
ously radiate. Involucre depressed to globular ds er broad ay 
flowers usually 5: ligules inconspicuous, white or whitish. Lobes of the disk- 
corollas ovate, ciliate. Anthers longer than the filaments. Achene flattened. 
bout 
Pappus of 2 or 3 seales or awns.— 12 species, American. 
Leaf-blades 1-2-pinnatifid : heads not firm at maturity. 1. P. Hysterophorus. 
Leaf-blades merely toothed: heads very firm at maturity. 2. P. integrifolium. 
1. P. Hysterophorus L. Plant annual, a dm. tall: leaf-blades elliptic to 
ovate in outline: involuere saucer-like mm. broad: disk-corollas, 1-1.5. 
ii long: achene 1-1.5 mm. long.— Rag. 
WEED.) — Pin elands, waste-places, cult. 
grounds, and roadsi 1; Coastal d and 
adj. provinces, Fla. o Te x. Mo. Pa. 
2. P. integrifolium L. Plants uenia 
4-12 dm. tall: blades of the basal leave 
nda to lanceolate: involucre we ole 
l broad: 
becoming globular, 4-6 mm. : disk- 
ae 2.5-3 mm. long: ache 
long.—Dry soil, woods.and hillsides, various 
Po í , Minn., and Md.— 
Spr.-su —P. hispidum Raf., with rough- 
a foliage and coarsely s d or 
m ed Mer known ange from. 
Tex nn and Mo. is to b: le d from 
W. A 
