COMPOSITE FAMILY 27 1 



C. nana Rich., may occur near timber-line. It is a dwarf 

 with obovate, entire, glabrous leaves. 



50. HIERACEUM. Hawkweed. 

 Ours perennial herbs with simple and narrow involucres. 

 Akenes not narrowed above, with a single row of fragile 

 bristles. 



1. H. albifldrum Hook. Stems 1 to 3 ft. high, leafy only at 

 base, ending in panicles of white-flowered heads. Leaves 

 broadly oblanceolate or oblong, entire or shallowly toothed, 

 3 to 6 in. long, the lower ones (and base of stem) bristly with 

 long hairs. Pappus dull white. — Open pine forests, common. 



2. H. hdrridum Fries. Stems 4 to 12 in. high, leafy up to 

 the panicle of yellow heads. Leaves oblanceolate or oblong, 

 obtuse, entire, 1 to 4 in. long, shaggy with long hairs. Pappus 

 reddish. — Among rocks from 4000 ft. alt. to timber-line. 



3. H. gracile var. detonsum Gray. Stems 6 to 18 in. high, 

 nearly naked except at the leafy base, the few heads yellow 

 (involucre black-hairy). Leaves obovate or oblong-spatulate, 

 1 to 4 in. long, entire or shallowly toothed, glabrous and 

 green. Pappus dull white. — Moist, shaded soil, 8000 ft. alt. 

 to timber-line. 



