224 RHAMNACEAE. 



carpels depressed, 6 mm. in diameter, scarcely lobed, smooth, crest- 

 less. 



Santa Monica and Santa Ana Mountains, in canyons; extending 

 northward to Santa Barbara, where it was first found by Nuttall. 



3. C. cordulatus Kell. A low much branched shrub forming 

 low flattened clumps, with whitish branchlets beset with short 

 stiff spinose branchlets; leaves mainly ovate, 1-2 cm. long, usually 

 denticulate, green above, and very minutely puberulent, pale beneath 

 and more distinctly puberulent, 3-nerved; flowers white in simple 

 often clustered racemes; capsules slightly depressed and deeply 

 lobed, smooth, obscurely crested. 



A very common species in the coniferous forests of the Sierra 

 Nevada and southern California, mostly above 5000 feet. 



4. C. divaricatus Nutt. An arborescent shrub with very pale 

 spinose pubescent branches; leaves ovate, acute or obtuse at apex, 

 rounded or subcordate at base, 1-2 cm. long, denticulate to nearly 

 entire, light green and minutely puberulent above, more distinctly 

 puberulent below and paler, firm in texture; racemes mostly simple, 

 5-8 cm. long; peduncles pubescent and viscid; flowers light blue; 

 capsule 3 mm. high, shallowly lobed, smooth and crestless, very 

 viscid. 



Foothills of the southern Sierra Nevada, south to the San Ber- 

 nardino Mountains, but not common south of Ventura County. 



4a. C. divaricatus eglandulosus Torr. Distinguished from the 

 typical form, by the glabrous twigs and entire leaves which are 

 glabrous above and sparsely puberulent on the veins beneath. 



This is the most common Ceanothus in the chaparral of southern 

 California, ranging from the San Gabriel Mountains to northern 

 Lower California. 



5. C. sorediatus H. & A. Shrubby or somewhat arborescent, 

 2-4 mm. high, with olive or at length purplish twigs; leaves oblong- 

 ovate, rounded or subcordate at base, glandular-dentate, 1-2 cm. 

 long, glabrous and glossy or sparingly pubescent when young above, 

 glabrous or minutely pubescent beneath, silky-pubescent on the 

 principal veins and petioles; inflorescence at first villous, 2.5-5 cm. 

 long; flowers deep blue; capsule globose, 4 mm. in diameter, smooth 

 or slightly wrinkled, slightly lobed, crestless. 



A species of the coast mountains of central California, said to 

 occur in the San Gabriel Mountains, but not seen by the author. 



6. C. tomentosus Parry. Shrub 2-4 m. high, with slender gray 

 or reddish, at first tomentose and usually densely verrucose branches; 

 leaves round-ovate or elliptic, consi)icuously glandular-toothed, 

 minutely velvety above, densely white or brownish tomentose 

 beneath, 1-3 cm. long, short-petioled; inflorescence loosely tomen- 

 tose, 2.5-5 cm. long; flowers deep blue or rarely white; capsule 4 mm. 

 in diameter, somewhat depressed, smooth, slightly crested, dis- 

 tinctly lobed. 



Occasional in the chaparral belt of the San Gabriel, San Bernar- 

 dino and Cuyamaca Mountains, 3000-5000 feet altitude. 



