COMPOSITE FAMILY / 253 
XXI, PYRRHOPAPPUS DC. (SITILIAS) 
Annual or biennial; stem erect, leafy below, nearly naked 
above, smooth. Leaves oblong, toothed or pinnatifid. Heads 
large, long-peduncled ; involucre cylindrical or spreading, the 
inner row of bracts erect, united at the base, the outer rows 
shorter and spreading; receptacle naked. Flowers yellow; 
rays truncate, 5-toothed at the apex. Akenes oblong, 5-ribbed, 
-narrowed above into a long and slender beak; pappus soft, 
tawny, with a short, soft-hairy ring at the base.* 
1. P. carolinianus DC. Farsz Danpexion. Annual or biennial ; 
stem glabrous, furrowed, branched above, 2-3 ft. high. Lower leaves 
lanceolate to oblong, entire, toothed or pinnatifid, narrowed into a 
margined petiole ; the upper sessile, bract-like, entire. Heads few, 
long-peduncled; peduncles and involucre sometimes finely downy; 
inner bracts calloused at the apex, the outer awl-shaped and spread- 
ing. Akenes much shorter than the thread-like beak. Common in 
fields.* 
XXII. HIERACIUM L. 
Perennial herbs, often covered with glandular or star-shaped 
hairs; juice milky. Leaves alternate. Heads solitary, or in 
corymbs or panicles; bracts of the involucre many, overlap- 
ping, unequal; receptacle flattish, naked, pitted. Corollas 
yellow, rarely orange. Arms of the style slender and upper 
part of the style hairy; akenes angled or grooved, not beaked. 
Pappus hairs in a single row, simple, stiff, tawny or brownish, 
brittle. [Most of our commoner species bloom in the late 
summer or autumn. | 
1. H. aurantiacum L. Orance Hreracium, Devit’s Paint Brus. 
Stem leafless or occasionally with 1 or 2 small sessile leaves, clothed 
with long hairs. Basal leaves oblanceolate, hairy, 2}-6 in. long. 
Scapes 8-24 in. high. Heads corymbed, about } in. in diameter, 
orange-red. A common weed, naturalized from Europe. 
2. H. venosum L. RATTLESNAKE Weep. Stem scape-like, usually 
leafless or nearly so, smooth, 1-2 ft. high. Basal leaves 2-5 in. long, 
obovate or ovate-oblong, generally purple-veined. Heads rather large, 
yellow, in a loose panicled corymb. Dry hills and roadsides, and in 
pine woods E. 
