1907] Hall. Compositae of Southern California. 193 



once or twice pinnately parted into narrow lobes : heads numer- 

 ous, on short filiform peduncles: involucre about 8 mm. high; 

 bracts linear-lanceolate, tapering into setaceous often pinkish 

 awns : receptacle with 5 to 10 rigid persistent awns nearly equal- 

 ling or even exceeding the flowers : paleae of disk-achenes usually 

 4, narrow, acuminate, nearly equalling the flowers, or some much 

 shorter and obtuse ; paleae of marginal achenes all short and 

 sometimes much reduced. 



Common in the Lower and Upper Sonoran zones from Inyo 

 Co. across the Mohave and Colorado deserts to Utah, Arizona, 

 and Lower California and ascending the desert side of the moun- 

 tains to 2000 m. alt. : Swansea and Independence, Inyo Co., Hall 



6 Chandler, nos. 7173, 7307; Morongo, Colorado Desert, Parish, 

 no. 769 ; Upper Lake, Bear Valley, San Bernardino Mts., Parish, 

 no. 1833 ; Mohave Desert, Hall, no. 6048 ; Colorado Desert, Hall, 

 nos. 5809, 5847, 5904; Signal Mt., Colorado Desert, Brandegee; 

 Gold Mt., Nevada, 1500 to 1800 m. alt., Purpus, no. 6002; Cala- 

 majuet, Lower California, Brandegee, in part; etc. 



Var. attenuata (Gray) Jones, Proc. Calif. Acad. ser. 2, v. 699 

 (1895). C. attenuata Gray, Proc. Am. Acad. x. 73 (1874) ; Co- 

 ville, Contr. U.S. Nat. Herb. iv. 134 (1893). Pappus-paleae of 

 even the central flowers very short and obtuse, erose, or some of 

 them acute but not more than one-third the length of the corolla : 

 fimbrillae of the receptacle said to be few in number, but often 

 numerous in otherwise typical plants. Ehrenberg, Arizona, 

 1874, Janvier Death Valley, ace. to Coville ; Independence, Inyo 

 Co., Hall & Chandler, no. 7307 (paleae quadrate, minute) ; Bor- 

 rego Springs, Colorado Desert, Apr. 17, 1895, Brandegee ; San 

 Felipe, Colorado Desert, Brandegee ; Calamajuet, Lower Califor- 

 nia, Brandegee (with some paleae acuminate and one-half as 

 long as corolla, others, even on same achene, very short and ob- 

 tuse). 



3. C. stevioides H. & A., Bot. Beech. 353 (1840). 



Annual, a few cm. to 2 or 3 dm. high : herbage clothed with 

 a light tomentum which is somewhat deciduous, leaves once or 

 twice pinnately parted into numerous linear lobes which are only 



7 mm. or less long, or a few of the upper leaves entire : heads 

 scattered on short slender peduncles : some of the marginal co- 



