Ceanothus. RHAMNACE^E. 103 



about an inch long. Fl. i. 268 ; Torr. Bot. Mex. Bound. 46, t. 10. C. Lobbi- 

 anus, Hook. Bot. Mag. t. 4810. C. diversifolius, Kellogg, 1. c. i. 58 & 65 ? 



On dry hills in the Coast Kanges, from Santa Barbara (Miss S. A. Plummer) to Mendocino Co. 



5. C. decumbens, Watson, 1. c. Slender, trailing, hirsutely pubescent with 

 spreading hairs : leaves rather thin, not undulate, to 1 inches long, elliptic- 

 oblong, obtuse or acutish, somewhat cuneate at base, the greenish glands upon the 

 teeth usually stipitate : flowers in short dense shortly peduncled racemes, which are 

 about half an inch long or less. C. sorediatus, var., Torr. in Pacif. R. Rep. iv. 74. 



Frequent in the Sierra Nevada, from the Mariposa Grove northward. 



-t- -H +- Erect, with usually rigid divaricate or spinose branches : flowers in simple 



racemes or clusters : leaves rather small. 

 -n- Rarely or never spinose : leaves gland.ular-serrate : flowers blue, racemose. 



6. C. hirsutus, Nutt. Silky-pubescent with soft subappressed or spreading 

 hairs, or sometimes hirsute ; the branches rather rigid and said to be sometimes 

 spinose : leaves ovate to oblong-ovate, usually subcordate or rounded at base and 

 acute at the apex, \ to \\ inches long, not smooth above : flowers in simple axillary 

 and terminal racemes, 1 to 3 inches long, or rarely thyrsoid. Torr. & Gray, FL i. 

 266. C. oliganthus, Nutt. in same. 



About Santa Barbara, and in the Santa Susanna Mountains, Nuttall, Wallace, Brewer. 



7. C. sorediatus, Hook. & Am. Branches nearly glabrous, the inflorescence 

 pubescent : leaves smooth above, more or less tomentose beneath or rarely nearly 

 glabrous, silky on the nerves, oblong-ovate, to l inches long, subcordate or 

 rounded or often acutish at base, acute or obtuse at the apex : flowers in shortly 

 peduncled simple racemes, \ to 2 inches long. Bot. Beechey, 328. C. nitidus, 

 Torr. in Pacif. R. Rep. iv. 75. C. azureus, Kellogg, 1. c. i. 55. 



From San Diego to the Sacramento. 



++ -n- Branches mostly spinose, grayish : leaves usually entire, somewhat coriaceous : 

 floivers mostly white, racemose. 



8. C. divaricatUS, Nutt. Nearly glabrous : leaves oblong to oblong-ovate or 

 ovate, \ to 1^ inches long, rounded at base, acute or obtuse above, not tomentose 

 beneath : flowers light blue or white, in nearly simple often elongated racemes, 1 to 

 4 inches long : fruit resinous, 3 lines in diameter. Torr. & Gray, Fl. i. 266. 



From San Diego northward to Oregon. The spines often wholly wanting, and branches green. 



9. C. incanus, Torr. & Gray. Leaves hoary beneath with a very minute 

 tomentum, broadly ovate to elliptic, f to 2 inches long, cuneate to cordate at base, 

 acutish or obtuse at apex : flowers in short racemes : fruit resinously warty, over 

 two lines in diameter. FL i. 265 ; Hook. & Arn. Bot. Beechey, 328. 



From Santa Cruz to Lake County ; a large straggling shrub on the banks of creeks. 



10. C. cordulatus, Kellogg. Hirsutely pubescent with short erect or spread- 

 ing hairs : leaves oval-elliptic, | to 1 inches long, cuneate to subcordate at base, 

 usually rounded and sometimes serrate at the apex, the serratures scarcely glandular : 

 flowers white, in short simple racemes, an inch long or less : fruit smaller, not resin- 

 ously dotted. Proc. Calif. Acad. ii. 124, fig. 39. C. divaricatus, var. eglandulosus, 

 Watson, Bot. King Exp. 51. 



In the Sierra Nevada from the Yosemite northward. Low, flat-topped, and much spreading ; 

 known as "Snowbush." 



* * Leaves pinnateli/ veined : flowers blue. (Small-leaved forms of C. dentatus may 



be referred here.) 



1 1. C. spinosus, Nutt. 1. c. Becoming a small tree, 20 to 30 feet high, with rigid 

 and somewhat spiny branchlets, glabrous or nearly so : leaves somewhat coriaceous, 



