282 University of California, Publications in Botany. IT OL - 3 



no. 6384, and Jim., 1904, Grinnell; Tehachapi Mts., Kern Co.. 

 Hasse & Davidson, no. 1737 ; thence north and east. 



4. C. occidentalis Nutt., Journ. Acad. Philad. vii. 29 (1834). 

 GRAY HAWKSBEARD. 



Stems stout, usually several from the strong perennial root, 

 branching above, the whole plant 1 to 2 dm. high : herbage tomen- 

 tose (the tomentum sometimes with a tendency to fall in age) 

 and often glandular-hirsute above, especially on the peduncles: 

 leaves thickish, runcinately toothed or deeply pinnatifid into lin- 

 ear or lanceolate lobes, the uppermost portion entire, acuminate : 

 involucre 10 to 30-flowered, 12 to 15 mm. high, calyculate, its 8 

 to 24 bracts oblong-lanceolate: achenes brown, fusiform. 10 to 18- 

 costate, 8 or 9 mm. long. 



On dry forested slopes of the Transition Zone (rarely in the 

 Upper Sonoran) : Bear Valley, San Bernardino Mts., Parish, no. 

 1459; Pinos, Frazier, and Alamo Mts., Ventura Co., Hall, nos 

 6556, 6595, 6703, respectively; north to Washington, east to 

 Nebraska, etc. 



Var. subacaulis KelL, Proc. Calif. Acad. v. 50 (1873). 

 C. subacaulis Coville, Contr. U. S. Nat. Herb. iii. 562 (1896). 

 Herbage (especially the peduncles, petioles, and midribs of the 

 leaves) usually hirsute with spreading glandless hairs; leaves 

 deeply pinnatifid or bipinnatifid. Bear Valley, San Bernardino 

 Mts., Parish, ace. to Coville ; northern Sierra Nevadas. 



Two distinct forms (in addition to the named variety) may 

 be segregated from C. occidentalis as above characterized; the 

 one, represented by such specimens as my nos. 6595 and 6703. 

 being merely canescent-tomentose ; the other, represented by Mr. 

 Parish's no. 1459 and my no. 6556, having bristly gland-tipped 

 black hairs on the inflorescence, in addition to the tomentum. 

 The non-hirsute form sometimes exhibits a few sessile yellow 

 glands on the involucral bracts. The var. subacaulis differs from, 

 the species mainly in the absence of glands on the spreading hairs 

 when these are present, but some specimens of both the species 

 and the variety are destitute of spreading hairs. 



