Thistle Tribe 441 



feet and fertile or rarely dioecious, their corollas slender, 

 with deeply 5-cleft limb. Filaments pilose or rarely 

 glabrous. Achenes obovate or oblong, compressed or 

 obtusely 4-angled, smooth or ribbed. Pappus of several 

 series of slender plumose minutely serrulate or simple 

 bristles, connate at base. 



1. C. edulis (Nutt.) Greene. Stout, 1-2 m. high, pubescent, 

 leafy up to the short panicle ; leaves oblong or narrower, sinuate- 

 pinnatifid, weakly prickly; heads 3-4 cm. high, depressed-glo- 

 bose, few in a terminal cluster, leafy-bracted at base; involucre 

 arachnoid when young; flowers deep purple, their segments 

 shorter than the throat. 



Pasadena, McClatchie. 



2. C. Californicus (Gray) Greene. Rather slender, 6-12 dm. 

 high, canescently woolly; leaves sinuate-pinnatifid, moderately 

 prickly; heads solitary on long peduncles, about 4 cm. high; 

 involucres somewhat woolly ; the lower bracts coriaceous-acerose, 

 spreading and incurved, the others straight, all subulate-spines- 

 cent at the tip ; flowers lilac-purplish or rose color ; lobes shorter 

 than the throat. 



Occasional in open places in the Santa Monica, San Gabriel and Santa 

 Ana Mountains. May-July. 



3. C. occidentalis Nutt. Stout, 6-9 dm. high ; leaves deeply 

 pinnatifid, glabrate above, canescently tomentose beneath; 

 heads solitary on stout peduncles ; involucre subglobose; bracts 

 straight, subulate-lanceolate, with short spines, densely covered 

 with cobwebby hairs ; flowers deep red-purple ; lobes longer than 

 the throat. 



Common on sandy soil, especially toward the coast. May-July. 



65. CYNABA L. ARTICHOKE. 



Stout perennial prickly herbs, with pinnatifid sessile 

 leaves, their lobes spinescently tipped, and large heads of 

 purple tubular flowers. Involucral bracts well-imbri- 

 cated, coriaceous, spinescent. Receptacle fleshy, fimbril- 

 late. Achenes obovate, compressed and somewhat 

 4-angled. Pappus of many series of plumose bristles. 



