1907] Hall. Compositae of Southern California. 121 



ace. to Davidson and to Abrams ; dry plains near San Bernardino, 

 San Jacinto, and San Felipe, ace. to Parish ; Colorado to Mexico, 



2. F. acanthicarpa (Hook.) Coville, Contr. U. S. Nat. Herb, 

 iv. 129 (1893). Ambrosia acanthicarpa Hook., Fl., Bor. Am. i. 

 309 (1834). Franseria Hookeriana Nutt, Proc. Am. Philos. 

 Soc. ser. 2, vii. 345 (1841). Gaertneria acanthicarpa Britton, 

 Mem. Torr. Club v. 332 (1894). 



Diffusely spreading or sometimes rather strict, 3 to 6 dm. or 

 more high, from an annual (or more enduring?) root: herbage 

 scabrous or short-hirsute and somewhat canescent : leaves on long 

 petioles, broadly ovate in outline, once or twice pinnatifid into 

 short rounded often toothed lobes : staminate racemes solitary or 

 in small panicles, the heads nodding on short slender peduncles : 

 fruiting involucres in the axils below, either solitary or 2 or 3 

 together, 1-flowered, glabrous; spines flat, thin, lanceolate-subu- 

 late, with straight or slightly curved but not uncinate tips. 



Common on sandy plains and in stubble from Southern Cali- 

 fornia (Valley Center, Van Deventer Flat, San Bernardino, Los 

 Angeles, Mohave Desert, Ft. Yuma, etc.) to Washington and 

 Colorado. 



3. F. bipinnatifida Nutt., Trans. Am. Philos. Soc. ser. 2, vii. 

 344 (1841). F. Chamissonis bipinnatisecta Less., Linnaea vi. 507 

 (1831). Gaertneria bipinnatifida Kuntze, 1. c. 



Stems procumbent, 6 to 10 dm. long, from an herbaceous 

 perennial root, somewhat hirsute : leaves 3 to 10 cm. long, twice 

 or thrice pinnately parted into oblong lobes, canescent or almost 

 silky : staminate heads in dense terminal spikes or racemes : fruit- 

 ing involucre ovate-fusiform, armed with thick somewhat flat- 

 tened spines, some of which are curved at the tip, but not at all 

 hooked. 



Common in sandy places along the beach from San Martin 

 Island (off the coast of Lower California), San Diego, and Santa 

 Catalina Island to British Columbia. 



Probably only a form of F. Chamissonis, since the two com- 

 monly occur together, and intermediate leaf -forms are plentiful 

 at least on the San Francisco Peninsula. 



4. F. Chamissonis Less., Linnaea vi. 507 (1831). Gaertneria 

 Chamissonis Kuntze, 1. c. 



