COMPOSITE FAMILY 253 



XXI. PYHRHOPAPPUS 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, 6-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. False Dandelion. 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.* 



XXn. 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, xinequal ; receptacle flatfish, 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. Or.a:n'ge Hieracidm, Devil's Paint Brush. 

 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 f in. in diameter, 

 orange-red. A common weed, naturalized from Europe. 



2. H. venosum L. Rattlesnake Weed. 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. 



