^G 



r(jFA'( iUN ACK J<:. Chorizaullu 



■^ -1- Teeth of the involucre scariousbj manjlued or v^hollij herbareous : more dif- 

 fuse and decumbent or usceitdiiif/, with more numerous acuttered heads, rarelij 

 erect. 



8. C. diffusa, IJenth. Very slemler, villous-pubescent, the steins at length ile- 

 canibent iiiid iiiclies long, sparingly branched : leaves narruwly spatulate, mostly 

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

 loose : involucres a line long, uneciually toothed, the longer teeth etjualling the tube, 

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

 uncinate : (lowers a line long, glabrous, very shortly pedicelled, shortly G-cleft : seg- 

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

 near the base ; anthers oval. — PI. Ilartw. 333, & ])(J. 1. c. ; Torr. ^^^ (iray, 1. c. 



Near Monterey, ou the dry sainly iilaiu {J/arlti\y) ami on the seashore, Pan-ii. 



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

 inches higii : leaves ovate or rounded, 3 to (5 lines broail, on slender petioles : bra<:ts 

 loliaceous, linear-oblanceolate, i)ungent : iieads small: involucres U lines long, the 

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

 curved, shortly awned : llowers U 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, Bixwcr. 



10. C. pungens, r.cnth. Usually slendiu- and more or less decumbent or at 

 lirst erect, villous-pulu'scent ; stems often a foot long or move, leafy: leaves spatu- 

 late or oblanceolate, about an inch long, mostly opposite : ])racts similar, narrower, 

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

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

 very shortly pedicelled, narrowed at base, U lines long, glabrous or often villous ou 

 the nerves, shortly cleft : segments e(pial, oblong, entire : filaments more or less 

 adnate to the lower part of the tube. — Linn. 'I'rans. xvii. 419, t. 19, f. 2, ^ DC. 

 1. c. ; Torr. & Cray, 1. c 194. 



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



11. C. valida, AVatson. ISIostly 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 ecpially toothed; teeth 

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

 narrowly tubidar,"2.V lines long, villous or glabrous, cleft a third of the way down ; 

 segments obhjng, very unecjual, the shorter ones erose: lilaments 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. IV-tersb. 

 Aeud.), and aUo'iolhi'ted by Sauuich, probably in the same rej^ion. 



12. C. Palmeri, Watson, 1. c Stout, erect and branching, villous-pubcscent, 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 nc-arly equal : llo\v(!rs rose-colored, 

 2 lines long, nearly sessile, glal)rous, broadly lobed above : outer segments orbicular, 

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



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

 * * Involucres at leiujth scattered or onlij loosehj cijnioseh/ clustered ; teeth un- 

 equal, not scariousbj manjined. 



■\- Perianth dccplij chft, the lanceolate segments fimbriate: hares all radical: 

 bracts not foliaceous. 

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

 or branching fniui the base, becoming ditfusely much branched, inches high or 



