EHAMNE^. 77 



green above, 2 5 lines long, obovate, or oval, obtuse, short-petioled, 

 closely denticulate, the mucronate teeth having very large rather decid- 

 uous resin-glands: fl. few, light blue, in a simple usually capitate 

 raceme on a slender more or less leafy-bracted peduncle: capsule 

 sharply crested at summit. Wooded hills of Napa, Sonoma and Marin 

 counties. 



H- -i Branches spinescenl; flowers in smaller clusters. 



7. C. divaricatus, Nutt. Eigidly and diffusely branched, the 

 branches spinescent and divaricate, nearly glabrous: leaves ovate to 

 oblong, % 1)4 in long, rounded at base, acute or obtuse at summit, 

 not tomentose beneath, entire or minutely glandular-serrulate: racemes 

 rather lax, often leafy ; fl. blue or white : f r. of middle size, very resinous. 

 In the Coast Range; very common. 



8. C. incanus, Torr. & Gray. Spinescent branches thick and stout, 

 minutely cauescent, the foliage also cinereous-velvety and pale: leaves 

 coriaceous, tomentose beneath, broadly ovate or elliptical obtuse, sub- 

 cordate at base or somewhat cuneate, % 2 in. long: fl. white, in short 

 racemes from thick spurs or axillary branchlets : f r. 2 lines in diameter, 

 resinous and warty. In the Coast Range. 



9. C. sorediatus, Hook. & Arn. Shrubby or arborescent, 510 ft. 

 high, nearly glabrous: branches spreading or recurved, and with short 

 stiff branchlets : leaves subcoriaceous, glossy above, glabrous or somewhat 

 tomentose beneath, but silky along the veins, oblong-ovate, %].% in. 

 long, rounded or subcordate at base: racemes of deep blue, ^ 2 in. long, 

 usually not longer than broad. Plentiful on Mt. Tamalpais, on the 

 northern slope; common in the Berkeley Hills. March May. 



* * Evergreen shrubs; branches small-leaved, with warty stipules; leaves 



opposite, coriaceous, closely pinnate-nerved; fruit with 3 horns. 



i H Shrubs erect, with short rigid branchlets. 



10. C. cuneatus (Hook.), Nutt. Stems clustered, 612 ft. high, the 

 branchlets short and remote, glabrous or nearly so: leaves cuneate-obo- 

 vale, or oblong, obtuse or retuse, entire, % ^ l n g or l ess > exceeded by 

 the profuse simple subsessile umbellate clusters of rather large dull- 

 white heavy-scented flowers: fr. rather large; horns short, erect. Var. 

 ramulosus, Greene. Smaller, the branchlets more numerous and more 

 leafy: leaves narrower and longer, more tomentose beneath: fl. half as 

 large, scentless, deep blue : fr. smaller and more elongated. The type 

 on Mt. Diablo and near Los Gatos: the variety in the Coast Range only. 

 February April. 



11. C. divergens, Parry. Low, almost diffuse, the long rigid diver- 

 gent branches sometimes almost, trailing, pubescent when young: leaves 1 



