Buckthorn Family 243 



slender-spiny glabrous twigs; leaves elliptic, very obtuse or 

 emarginate, rounded or acutish at base, coriaceous, glabrous, 2-3 

 cm. long, entire, petioles glabrous or appressed-pubescent, 4-8 

 mm. long; thyrsus 10-15 cm. long and half as broad; flowers 

 pale blue; carpels depressed, 6 mm. in diameter, scarcely lobed, 

 smooth, crestless. 



Santa Monica and Santa Ana Mountains, in canyons ; extending northward 

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



3. C. divaricatus Nutt. Shrub, 1-2 m. high, with pale green 

 glabrous or puberulent mostly very glaucous twigs, divergent, 

 some ending in spines ; leaves ovate, sometimes slightly cordate, 

 obtuse or acutish, glabrous and glaucous, coriaceous, 3-nerved, 

 10-15 mm. long; inflorescence 5-7 cm. long, mostly narrowly 

 oblong, dense, glabrate; flowers pale blue; capsule smooth, not 

 lobed, and scarcely crested, clammy, becoming dry. 



Very common in the chaparral belt. 



*- - Leaves glandular-toothed. 



4. 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, conspicuously glandular- 

 toothed, minutely velvety above, densely white or brownish 

 tomentose beneath, 1-3 crn. long, short-petioled ; inflorescence 

 loosely tomentose, 2.5-5 cm. long; flowers deep blue or rarely 

 white; capsule 4 mm. in diameter, somewhat depressed, smooth, 

 slightly crested, distinctly lobed. 



Occasional in the chaparral belt of the San Gabriel, San Bernardino and 

 Cuyamaca Mountains, 3000-5000 feet altitude. 



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. 



