1907] Hall. Compositae of Southern California. 195 



4. C. Fremont! Gray, Proc. Am. Acad. xix. 30 (1883). 



Annual, either slender or robust, .5 to 4 dm. high, branching: 

 herbage slightly woolly when young but early glabrate except 

 the puberulous or tomentose peduncles and involucres : leaves 2 

 to 5 cm. long (rarely even 1 dm.), narrowly linear and entire, or 

 once pinnately parted into similar lobes: heads terminating 

 simple erect peduncles : involucral bracts broadly linear, acutish, 

 with prominent midrib: marginal corollas often much enlarged 

 and irregular, sometimes developing a cuneate 4 to 5-cleft ligule : 

 pappus of central achenes usually of 4 to 6 slender acute paleae 

 nearly equalling the corolla, sometimes of 1 long and several 

 shorter paleae, these often of varying lengths and either acute or 

 obtuse ; pappus of marginal flowers also variable but mostly of 1 

 long acute palea and 3 short obtuse scales. 



Chiefly in the Lower Sonoran Zone of the Mohave and Colo- 

 rado deserts, north to Bakersfield, east to Arizona : Coyote Canon. 

 Colorado Desert, Hall, no. 2807 and no. 2807a; east base San 

 Jacinto Mt., Jepson & Hall (Hall, no. 1850) ; from near Palm 

 Springs to Whitewater, Colorado Desert, Parish, nos. 343, 4119 ; 

 same locality Oilman, no. 33, also Copeland; above Whitewater, 

 Schellenger, no. 76; Antelope Valley, Mohave Desert, Hall, no. 

 3032 (Palmdale) and no. 3042 (Rock Creek) ; desert slope Cajon 

 Pass, Hall, no. 6215 ; Santa Ana Canon, San Bernardino Mts., at 

 2100 m. alt. in the Transition Zone ( !), Hall, no. 7574 (very rare 

 at this altitude) ; Argus Mts. and Bishop Creek, Inyo Co., Hall & 

 Chandler, nos. 6898, 7240 ; Bakersfield, Davy, no. 1891 ; Needles, 

 eastern San Bernardino Co., Miss Warner, no. 26 ; Fort Mohave, 

 Arizona, Cooper; etc. 



The variation in this species, as exhibited by the specimens 

 cited above, is remarkable. The disk-pappus commonly consists 

 of 4 equal lanceolate acute paleae about as long as the corolla, 

 while the marginal achenes have one of these long paleae and 3 

 short obtuse scales. But the following deviations occur: (a) two 

 or three of the paleae reduced and obtuse in some of the inner 

 flowers (Hall, nos. 1850, 3042) ; (5) all the achenes, marginal 

 as well as central, with 4 long acute paleae (Cooper) ; (c) some 

 of the marginal achenes with 4 long equal paleae, some with 1 

 long palea and 3 short obtuse unequal ones (Parish, no. 4119. 



