POLY GONE ;E. 155 



6—18 in. high, dichotomously branched, the main stem below with 

 Keveral whorls of oblanceolate petiolate leaves ; herbage hirsute, the 

 inflorescence and growing parts almost canescently so : capitate cymes 

 sessile and solitary in the lower forks, several and peduncled along the 

 upper branches ; bracts linear, with ace rose tips : involucres oblong- 

 campanulate, sharply angled ; segments unequal, the scarious margin 

 very narrow, purplish, the uncinate teeth not widely spreading : perianth 

 short-pedicellate ; lobes nearly equal, erose-denticulate and mucronu- 

 late. — In dry sandy soils along Monterey Bay, at Aptos, also at Alameda. 



5. C. Breweri, Wats. Proc. Am. Acad. xii. 270 (1878). Slender, soft- 

 pubescent, erect, with ascending branches, 2 — 4 in. high : leaves ovate or 

 rounded, 3 - (5 lines broad, on slender petioles; bracts linear-oblanceolate, 

 acerose-tipped : involucres few in the head, small (l^j lines long) ; teeth 

 slightly unequal, scariously margined at base, stout and curved, short- 

 awned : jjerianth glabrous or villous, the segments broadly oblong, the 

 inner ones shorter.~-At San liuis Obispo, on dry hillsides. Brewer; also 

 in Santa Margarita Valley. 



•n- ++ LoJien of iin'olucre villioul scarious tnargiiis. 



6. C. valida, Wats. 1. c. 271. Stout, 6 —18 in. high, branching above, 

 villous : lower leaves oblanceolate, 1 in. long, on long petioles : invo- 

 lucres in dense heads 2-3 lines long, the lobes nearly equal, slightly 

 spreading, the awns straight : perianth subsessile, narrowly tubular, 

 '2^2 lines long, villous or glabrous, cleft one-third of the length, the lobes 

 oblong, very unequal, the shorter ones ero.se : filaments adnate to the 

 middle or even higher. — In Sonoma Co., near Petaluma, etc. 



7. C, Palmeri, Wats. 1. c. Stout but low (3— 5in.), villous-pubescent: 

 leaves spatulate, 2 in. long; bracts oblanceolate, conspicuous: invohicres 

 in large dense clusters, 2 lines long : one segment long-awned, the rest 

 nearly equal : perianth subsessile, glabrous, rose-color, 2 lines long, 

 broadly lobed above, the outer, lobes orbicular, inner shorter, truncate or 

 bifid, shortly laciniate : stamens near the base. — From near Monterey to 

 San Luis Obispo, on rocky hills. 



+- -t— Of diffuse habit, • involucres scattered, or in loose clusters. 

 •M- Lobes of involucre with narrow scarious margins. 



8. C. pau^eus, Benth. Trans. Linn. Soc. xvii. 419. t. 19 (1837). 

 Branches prostrate, 6-12 in. long, hirsute-pubescent : leaves spatulate 

 or oblanceolate, 1 in. long, mostly ojjposite ; bracts similar biit narrower, 

 acerose at apex : involucres crowded on short lateral branchlets, 1^2—2 

 lines long, unequally toothed, usiially margined ; teeth strongly unci- 

 nate : perianth obconic, subsessile, shortly cleft ; segments equal, oblong, 

 entire : filaments more or less adnate to the lower part of the tube. — 

 Common on sandy hills on the San Francisco peninsula, and near 

 Monterey. May — Aug. 



