104 



RHAMNACE^. 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. 



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

 4 to 6 feet liigli : 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 1| 

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



In the Coast Ranges from ]\Ionterey to San Francisco, Douglas, Bolandcr, 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. dcntatus. 



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 toothed or entire : stipules mostly large and warty: Jtowersin sessile or 

 shm-tly peduncled axillary clusters : fruit larger, toith three horn-like or warty 

 prominences helow 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 tomeutum : leaves ovate-oblong, ^ to 1 inch long, obtuse or 

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

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

 Pacif. Pt. 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 : floAvers 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. macrocarims, IS'utt. 1. c, and C. megacarpus, Nutt. 

 Sylva, ii. 46. 



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



1 7. C. rigidus, Xutt. 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-cuueate, mostly spinose only near the apex, on sliort 

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

 Hartw. 302. C. ameatus, Kellogg, Proc. Calif. Acad. i. 55 1 



Freiiuent in the moimtains, on shaded slopes, from Humboldt County and the Upper Sacra- 

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



