104 RHAMNACE.E. Ceanothus. 



entire, oblong, 9 to 15 lines long, obtuse or retuse, somewhat cuneate at base, on 

 slender petioles 2 to 4 lines long : flowers deep blue, in a thyrse or in simple ra- 

 cemes, very fragrant : fruit resinously coated, 2| to 3 lines in diameter. 



From Santa Barbara to Los Angeles, Nuttall, Parry, Brewer. Commonly known in that 

 region as " Redwood," from the color of the timber, which is of sufficient size to be of value. 



12. C. papillosus, Torr. & Gray. More or less hispidly villous or tomentose, 



4 to 6 feet high : leaves glandular-serrulate, and the upper surface glandular-papillose, 

 narrowly oblong, 1 to 2 inches long, obtuse at each end, on slender petioles : flowers 

 in close clusters or short racemes, terminating slender naked peduncles : fruit 1A 

 lines broad, not resinous. Fl. i. 268 ; Hook. Ic. PI. t. 272 ; Bot. Mag. t. 4815. 



In the Coast Ranges from Monterey to San Francisco, Douglas, Bolander, Gray. 



13. C. floribundus, Hook. Pilose-scabrous: leaves small, 3 to 4 lines long, 

 oblong, acute, glandularly denticulate and undulate, shortly petioled : flowers in 

 globose clusters sessile at the ends of the short branchlets. Bot. Mag. t. 4806. 



This species is as yet known only from the figure and original description drawn from culti- 

 vated specimens. But for the peculiar inflorescence it might be a form of C. dentatus. 



14. C. Veitchianus, Hook. Glabrous nearly throughout : leaves thick, obo- 

 vate-cuneate, rounded at the apex, glandular- serrate, smooth and shining above, 

 minutely tomentose beneath between the veinlets, 6 to 9 lines long, on short stout 

 petioles : flowers bright blue, in dense crowded clusters at the ends of the leafy 

 branches. Bot. Mag. t. 5127. 



Also unknown from wild specimens. Raised from seeds sent by T. Bridges. 



2. Leaves small, often opposite, very thick, with numerous straight lateral veins, 

 spinosely toot/ted or entire : stipules mostly large and warty: flowers in sessile or 

 shortly peduncled axillary clusters : fruit larger, with three horn-like or warty 

 prominences below the summit : rigidly branched or rarely spiny shrubs. 

 CERASTES, Watson. 



15. C. crassifolius, Torr. Erect, 4 to 12 feet high, the young branchlets 

 white with a villous tomentum : leaves ovate-oblong, \ to 1 inch long, obtuse or 

 retuse, more or less tomentose beneath, rarely entire and revolutely margined ; peti- 

 oles stont : flowers light blue or white, in dense very shortly peduncled clusters. 

 Pacif. R Eep. iv. 75 & Mex. Bound. 46, t. 11. 



In the Coast Ranges from Mendocino County to San Diego ; Guadalupe Island, Palmer. 



16. C. CuneatUS, Nutt. Erect, 3 to 12 feet high, less tomeutose or nearly 

 smooth : leaves cuneate-obovate or -oblong, rounded or retuse above, on rather slen- 

 der petioles, entire or very rarely few-toothed : flowers white or occasionally light 

 blue, in rather loose clusters. Torr. & Gray, Fl. i. 267. C. verrucosus, Nutt. 1. c. ; 

 Hook. Bot. Mag. t. 4660. C. macrocarpus, Nutt. 1. c., and C. megacarpus, Nutt. 

 Sylva, ii. 46. 



From the Columbia River to Santa Barbara ; Guadalupe Island, Palmer. 



1 7. C. rigidus, Nutt. Erect, 5 feet high, the branchlets tomentose : leaves 2 to 



5 lines long, cuneate-oblong or usually very broadly obovate, often emarginate, few- 

 toothed above, very shortly petioled : flowers bright blue, in sessile clusters. Torr. 



6 Gray, FL i. 268 ; Hook. Bot. Mag. t. 4664 ; Torrey, Bot. Mex. Bound. 45, t. 9. 

 About Monterey, and reported also from Oakland. 



18. C. prostratus, Benth. Prostrate, nearly glabrous: leaves 3 to 12 lines 

 long, obovate or usually oblong-cuneate, mostly spinose only near the apex, on short 

 slender petioles : flowers bright blue, the clusters loose, on stout peduncles. PL 

 Hartw. 302. C. cuneatus, Kellogg, Proc. Calif. Acad. i. 55 ? 



Frequent in the mountains, on shaded slopes, from Humboldt County and the Upper Sacra- 

 mento to Mariposa County, and also on the eastern side of the Sierra Nevada. 



