334 Boraginaceae 



2. C. bar bigera (Gray) Greene. Bather stout, much branched, 

 2-4 dm. high, hispid and hirsute; leaves narrowly linear; spikes 

 elongated, the flowers becoming rather distant; calyx-lobes lin- 

 ear, attenuate, 6-8 mm. long in fruit, covered with long shaggy 

 bristles, usually intermingled with long white villous hairs ; 

 corolla often 6 mm. broad; nutlets rarely acuminate, about 2 

 mm. long, grayish, muricate-papillose ; scar open, dilated at base. 



Common in open dry places on the plains and foothills. March-May. 



3. C. intermedia (Gray) Greene. Resembling the last in 

 habit; calyx-lobes 3-5 mm. long, armed with rather rigid and 

 pungent, whitish or rusty-yellowish bristles ; corolla usually less 

 than 4 mm. broad; nutlets grayish, about 2 mm. long, oblong- 

 ovate, thickly rough-muricate ; scar wholly or partly open, with 

 an open areola. 



Frequent on dry open ridges and on the plains in the interior region. 

 March-May. 



4. C. ambigua (Gray) Greene. Stems rather slender, loosely 

 branching, 20-25 cm. high, sparsely hispid and hirsute; leaves 

 rather broadly linear ; flowers becoming scattered ; calyx-lobes 5-7 

 mm. long, beset with rather short, rigid bristles; corollas about 

 3 mm. broad ; nutlets deltoid-ovate, 2 mm. long, brownish, sparsely 

 and faintly muricate. 



Occasional in the upper portions of the chaparral belt and among the 

 pines. May-July. 



** Nutlets smooth and shining. 



5. C. flaccida (Lehm.) Greene. Slender, strict, 3-6 dm. 

 high, strigulose with minute close pubescence; leaves linear, 

 minutely more or less strigulose-hispid ; calyx erect in fruit, 

 appressed to the rachis, 4-5 mm. long; sepals filiform-linear, 

 thickish below, their bases very hispid with deflexed and strong, 

 somewhat hooked bristles; nutlets solitary, scarcely flattened 

 ventrally, the groove of attachment enlarged at base but not fur- 

 cate. (Krynitzkia oxycarya Gray.) 



Known in our region only from Chatsworth Park. 



6. C. microstachys Greene. Rarely over 3 dm. high, much 

 branched from the base, hispidulous or hispid; calyx in fruit 

 ascending or erect, but not appressed to the rachis, 2-3.5 mm. 

 long ; sepals linear, hispid with widely spreading, but not deflexed, 

 straight and somewhat pungent hairs ; nutlet solitary, somewhat 



