36 POLYGONACE.E. Chorizanthe. 



i -t Teeth of the involucre scariously margined or wholly herbaceous : more dif- 

 fuse and decumbent or ascending, with more numerous scattered heads, rarely 

 erect. 



8. C. diffusa, Benth. Very slender, villous-pubescent, the stems at length de- 

 cumbent and 6 inches long, sparingly branched : leaves narrowly spatulate, mostly 

 radical, an inch long or less : bracts short and acerose : heads small and rather 

 loose : involucres a line long, unequally toothed, the longer teeth equalling the tube, 

 the alternate ones shorter, mostly broadly scarious on the margin and long-awued, 

 uncinate : flowers a line long, glabrous, very shortly pedicelled, shortly 6-cleft : seg- 

 ments oblong, nearly equal, obtuse, the inner a little narrower : filaments inserted 

 near the base ; anthers oval. PL Hartw. 333, & DC. 1. c. ; Torr. & Gray, 1. c. 



Near Monterey, on the dry sandy plain (Hartweg) and on the seashore, Parry. 



9. C. Breweri, Watson. Slender, softly pubescent, ascending or erect, 2 to 4 

 inches high : leaves ovate or rounded, 3 to 6 lines broad, on slender petioles : bracts 

 foliaceous, linear-oblanceolate, pungent: heads small: involucres 1| lines long, the 

 short slightly unequal teeth united at base by an inconspicuous margin, stout and 

 curved, shortly awned : flowers 1^ lines long, glabrous or villous : segments broadly 

 oblong, the inner ones shorter : stamens at the base. Proc. Am. Acad. xii. 270. 



On rocky hillsides at San Luis Obispo, and in sandy soil in Santa Margarita Valley, Brewer. 



10. C. pungens, Benth. Usually slender and more or less decumbent or at 

 first erect, viiloiis-pubescent ; stems often a foot long or more, leafy : leaves spatu- 

 late or oblanceolate, about an inch long, mostly opposite : bracts similar, narrower, 

 awned at the apex : heads small : involucres 1| to 2 lines long, unequally toothed 

 (the alternate teeth smaller), usually margined; teeth strongly uncinate : flowers 

 very shortly pedicelled, narrowed at base, 1| lines long, glabrous or often villous on 

 the nerves, shortly cleft : segments equal, oblong, entire : filaments more or less 

 adnate to the lower part of the tube. Linn. Trans, xvii. 419, t. 19, f. 2, & DC. 

 L.C.J Torr. & Gray, 1. c. 194. 



Very common in sandy plains near San Francisco, to Monterey and probably southward. 



11. C. valida, Watson. Mostly stout, erect, six inches high or less, villous- 

 pubescent, sparingly branched : leaves oblanceolate, an inch long ; the bracts similar : 

 involucres in rather crowded heads, 2^ to 3 lines long, nearly equally toothed; teeth 

 slightly spreading, with straight awns, scarcely margined : flowers nearly sessile, 

 narrowly tubular, 2| lines long, villous or glabrous, cleft a third of the way down ; 

 segments oblong, very unequal, the shorter ones erose : filaments adnate to the mid- 

 dle or nearly to the summit. Proc. Am. Acad. xii. 271. 



Sonoma County ; specimens in herb. Gray are from the Russian Colony (from herb. St. Petersb. 

 Acad.), and also collected by Samuels, probably in the same region. 



12. C. Falmeri, Watson, 1. c. Stout, erect and branching, villous-pubescent, a 

 span high or less : leaves spatulate, 2 inches long : bracts oblanceolate, conspicuous : 

 involucres in large close terminal cymes, 2 lines long; the teeth not at all margined 

 and slightly divergent, one long-awned, the rest nearly equal : flowers rose-colored, 

 2 lines long, nearly sessile, glabrous, broadly lobed above : outer segments orbicular, 

 the inner shorter, truncate or bifid, shortly laciniate : stamens near the base. 



Near San Luis Obispo, Palmer (n. 464), 1876. 



* * Involucres at length scattered or only loosely cymosely clustered; teeth un- 

 equal, not scariously margined. 



t- Perianth deeply cleft, the lanceolate segments fimhriate : leaves all radical : 



bracts not foliaceous. 



13. C. fimbriata, Nutt. Somewhat villous-pubescent or glabrate : stem erect 

 or branching from the base, becoming diffusely much branched, 6 inches high or 



