RHAMNACEAE. 225 



7. C. oliganthus Nutt. Shrubby or arborescent, 3-5 m. high, 

 with grayish or reddish, densely villous, rather flexible twigs; leaves 

 ovate to broadly elliptic, rounded or subcordate at base, obtuse 

 or acute, 2-4 cm. long, hirsute with rather long appressed hairs 

 above, loosely hirsute beneath especially along the veins; inflores- 

 cence loosely puberulent, villous, 2.5-5 cm. long; flowers deep blue 

 to purplish; capsule depressed, smooth, slightly lobed, strongly 

 crested. ( C. hirsutus Nutt.) 



Frequent in the chaparral belt of the San Gabriel Mountains; 

 2500-4500 feet. 



8. C. megacarpus Nutt. Shrubby, 2-3 m. high, with gray or 

 reddish, at first appressed-pubescent twigs; leaves rather thick, 

 spatulate or obovate, cuneate, obtuse to emarginate, glabrous and 

 dull above, minutely canescent beneath, 1-2 cm. long, margin 

 slightly revolute, entire or rarely denticulate; capsule 8-12 mm. 

 in diameter, laterally horned, apical crests low, scarcely lobed. 

 (C macrocarpus Nutt.) 



Frequent in the Santa Monica and Santa Ana ranges, extending 

 north to Santa Barbara. 



9. C. jepsoni Greene. A rigid erect shrub, 1-2 m. high, with stiff 

 divergent gray branches; leaves elliptic-oblong, spinose-toothed, 

 usually infolded along the midrib, and undulate-margined, 10-18 

 mm. long, glossy green and glabrous above, whitish between the 

 reticulations beneath; stipules small; flowers usually blue; capsule 

 about_ 8-10 mm. high, more or less wrinkled and with very stout 

 erect irregularly lobed or wrinkled horns. 



Specimens, collected only in flower on the hills west of Pomona 

 {Baker), seem to belong to this species, which is otherwise only known 

 in the Coast Ranges north of San Francisco Bay. 



10. C. crassifolius Torr. Shrub, 2-3 m. high, with grayish white 

 or rusty tomentose twigs; leaves thick, elliptic-obovate, cuneate 

 or rounded at base, obtuse, somewhat revolute, pungently dentate 

 or rarely entire, 1.5-3 cm. long, minutely roughened, at length 

 glabrous and pale green above, densely tomentose beneath; stipules 

 very large; capsules 8 mm. in diameter, with 3 stout erect horns 

 near the tip. 



Common in the chaparral belt from Santa Barbara to Lower 

 California. 



11. C. cuneatus Nutt. A rigid erect shrub, 1-2.5 m. high, with 

 stiff divergent grayish branches; leaves oblong-obovate, 8-15 mm. 

 long, dull rather blue-green above and glabrous, whitish between 

 the reticulations beneath, entire; flowers umbellate, white; capsules 

 5 mm. long, with 3 rather stout erect horns. 



The most widely distributed of the western ceanothi, ranging 

 from Oregon to Lower California. Within our range it is not 

 common, being found principally on gravelly talus slopes or in 

 washes; Azusa, Claremont. 



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