498 



COMPOSITE. 



Higher mountain slopes of the Coast Ranges; also in the Sierra 

 Nevada. May-July. 



2. M. Clevelandi Gray. One-half to ft. high, glabrous 

 throughout; radical leaves pinnatifid, the cauline scattered and more 

 nearly entire; panicle narrow; heads 3 lines high, few-flowered; 

 achenes oblong-linear, minutely striate-costate; outer pappus of one 

 persistent bristle and a circle of white setulose teeth. — (M. parviflora 

 Greene, not Benth.) 



Antioch and plains bordering the eastern base of the Mt. Diablo 

 range. Apr.-May. Bentham's type of M. parviflora was collected 

 in woods near Santa Cruz. 



3. M. Californica DC. Acaulescent; herbage conspicuously 

 wooll) r when young with very long and soft hairs; leaves laciniately 

 pinnatifid into narrowty linear or almost filiform lobes; scapes 4 to 6 

 in. high, each bearing one head, the heads rather large; involucre 4 

 to 6 lines high, its bracts narrowly linear or subulate, in about 3 

 ranks; bristles of the receptacle delicate, usually present; achenes 

 narrow, lightly striate; outer pappus of 2 persistent bristles and 

 some intervening minute teeth. 



Sandy soil: Antioch to Monterey Co. and southward. Apr.-May. 



4. M. Coulteri Gray. Snake's Head. Simple or branching 

 from the base, 5 to 16 in. high, the herbage glabrous and glaucescent; 

 cauline leaves sinuately pinnatifid, broad or somewhat auriculate at 

 the sessile base and with an elongated terminal lobe; heads sub- 

 globose, I to 1 in. broad; bracts of involucre silvery-scarious with a 

 linear central portion green, regularly imbricated in several ranks, 

 the short outer ones orbicular, the inner oval to lanceolate or linear; 

 achenes 15-ribbed and 4 or 5-angled, the summit obscurely denticu- 

 late by projection of the ribs; 1 or 2 stouter pappus-bristles persistent. 



Frequent in the Lower San Joaquin Valley and southward to 

 Southern California. Apr. 



12. HIERACIUM L. Hawkweed. 



Ours rough-hairy perennial herbs with entire or nearly entire leaves 

 and the heads in a panicle. Involucre cylindric or campanulate, its 

 main bracts in 1 to 3 ranks with shorter ones at base. Achenes linear, 

 striately ribbed, not beaked. Pappus a single row of tawny or dull 

 white fragile capillary bristles. (Greek hierax, a hawk.) 



1. H. albiflorum Hook. Stem nearly naked above, ending in 

 a panicle of white-flowered heads, H to 3 ft. high; leaves and lower 

 portion of stem thickly beset with tawny bristly hairs; leaves mostly 

 radical, oblong, narrowed at base to a winged petiole, or the upper 

 cauline sessile and often lanceolate and linear; involucre 3 or 4 lines 

 high, its bracts linear-subulate; achenes 1£ lines long; pappus dull 

 white. 



Dry woods in the mountains: Coast Ranges and Sierra Nevada. 

 June-Aug. 



