1907] Hall Compositae of Southern California. 235 



8. S. Californicus DC., Prodr. vi. 26 (1837). 



A simple or diffusely branched erect annual, 1.5 to 4 dm. 

 high : herbage glabrous or early glabrate : leaves linear to lanceol- 

 ate, remotely toothed or lobed or some even pinnately parted with 

 short obtuse lobes, the upper ones auriculate-clasping at the broad 

 base: heads commonly several or more numerous on elongated 

 peduncles: involucre 6 to 8 mm. high, nearly naked at base: rays 

 15 to 20, oblong, 6 to 8 mm. long : achenes canescent. 



Lower California to Santa Barbara : very common in loose 

 soil of the chaparral belt and also on sand dunes along the sea- 

 shore (where commonly robust and succulent). Feb. -May. 



9. S. Mohavensis Gray, Syn. Fl. i. pt. 2, 454 (1886). 



A slender much branched annual, a few cm. to 4 dm. high: 

 herbage glabrous: leaves ample, broadly oblong or oblanceolate. 

 obtuse, all but the basal with broad clasping base, coarsely few- 

 toothed (the largest 2 by 7 cm., but commonly much smaller) : 

 heads in a loose terminal cymose panicle; peduncles slender, 

 bracteolate: involucre 7 or 8 mm. high; bracts 12 to 15, linear, 

 acute, often penicillate but not black at tip ; calyculate bracts few 

 and minute: rays commonly wanting, when present usually de- 

 formed and not longer than disk (ace. to Gray) : achenes densely 

 canescent. 



Confined to the Desert Area: near the Colorado River, Lem- 

 mon, ace. to Gray; Signal Mt., Colorado Desert, Brandegee; 

 Panamint Mts., Inyo Co., ace. to Coville; Lower Sonoran Zone. 

 900 m. alt., in Pleasant Canon, Panamint Mts., Hall & Chandler. 

 no. 6910. 



10. S. sylvaticus L., Sp. PI. 868 (1753). 



A slender annual, branching more or less from the base, 1 to 

 3 or 4 dm. high : herbage glabrous or nearly so : leaves sessile by 

 an auricled base, linear or oblong, somewhat pinnatifid with small 

 oblong lobes, these entire or dentate : heads evidently peduncled. 

 in loose terminal clusters: involucre narrow, 6 mm. high; prin- 

 cipal bracts 10 to 20, not black-tipped ; minute outer bracts acute, 

 green or brown : rays about 5, not over 1 mm. long : achenes ap- 

 pressed-silky, the hairs short. 



Seldom seen, or passed over for S. vulgaris : Lower California ; 



