Buckwheat Family 113 



rarely 2-3-flowered, tubular or funnelform, sessile, 3-6- 

 angled or costate, 3-6-toothed or 3-6-cleft, its teeth 

 divaricate, cuspidate or awned. Flowers pedicellate or 

 nearly sessile, included within the involucre, or the seg- 

 ments protruding. Calyx 6-parted or 6-cleft, colored. 

 Stamens usually 9, rarely 3 or 6, adnate to the base of 

 the calyx-tube. Ovary glabrous. 



* Glabrous or glandular-pubescent. 



1. C. Thurberi (Gray) Wats. Somewhat gland ular-puberu- 

 lent, usually about 1 dm. high, branching from the base; leaves 

 2.5 cm. long, glabrous, slightly ciliate; bracts oblong, more or 

 less united, 2-6 mm. long; involucres glabrous, chartaceous, tri- 

 angular-prismatic, obscurely reticulated, 4-6 mm. long, 1-2 mm. 

 broad, with 3 broad straight awned spurs at base and 3-5 broad 

 short erect teeth ; flowers 1 or 2 on slender pedicels, pubescent at 

 base, nearly 2 mm. long; segments oblong-spatulate, obtuse or 

 emarginate. the alternate ones slightly shorter. 



Occasional on dry sandy plains, mostly farther inland than our range. 



2. C. leptoceras (Gray) Wats. Very slender and nearly gla- 

 brous ; leaves and bracts as in the last; involucre 4-6 mm. long, 

 somewhat hirsute, deeply 4-6-cleft, the coriaceous turbinate base 

 surrounded by as many rigid usually uncinate awn-like spurs ; 

 lobes rigid, narrow, unequal, attenuate into straight rigid some- 

 what divergent awns ; flowers 2 or 3, occasionally exserted, villous- 

 pubescent, 1 mm. long; segments narrowly oblong to ovate, 

 nearly equal. 



On dry sandy plains from San Gabriel eastward. 



3. C. Californica Gray. Hirsute and glandular, 3 dm. high 

 or less, often reddish ; bracts 1-2 cm. broad, lateral or rarely per- 

 foliate, lobed ; involucres on contracted branchlets and often 

 clustered in the axils, 4-6 mm. long, obtusely angled, 2-3-toothed 

 .and 2-3-sided; segments of the perianth obovate, entire, villous- 

 pubescent on the midvein. 



Common on sandy soil along the coast and in the interior valleys. 



** Villo us-pubescent or hirsute) not glandular. 

 *- Bracts notfoliaceous. 



4. C. staticoides Benth. Erect or decumbent, rather stout, 

 1-4 dm. high, with spreading branches, villous-pubescent, often 



