OF ARTS AND SCIENCES. 337 



2 lines in diameter, resinously warty. — Santa Cruz to Lake County, 

 California ; " a large straggling shrub on tlie banks of creeks." Col- 

 lected by Douglas, Brewer (n. 2663), Bolander (m.), Kellogg & liar- 

 ford (n. 126), and Dr. Gray. 



16. C. CORDULATUS, Kellogg, Proc. Calif. Acad. 2. 124, f. 39. 

 Hirsutely pubescent with short erect or spreading hairs ; leaves oval- 

 elliptic, ^,-1 1 inches long, cuneate to subcordate at base, usually rounded 

 and sometimes serrate at the apex, the serratures scarcely glandular ; 

 flowers in short simple racemes, an inch long or less ; fruit smaller, not 

 resinously dotted. — In the Sierra Nevada, from the Yosemite Valley 

 northward ; " low, flat-topped and much spreading, known as ' snow- 

 bush.'" Collected by Brewer (n. 1630, 1926), Bolander (n. 4892), 

 Bridges (n. 46), Gray and Lemmon. 



17. C. Fendleri, Gray. Silky pubescent; leaves narrowly oblong 

 to elliptic, 4—12 lines long, usually small, somewhat narrowed and 

 cuneate at base, obtuse or acute above ; flowers in short terminal 

 racemes. — In the Rocky Mountains from Colorado to New Mexico. 



c. Spinose ; leaves serrate ; flowers in small sessile clusters. Mexican. 



18. C. BUXiFOLius, Willd. Nearly glabrous, branches slender ; 

 leaves rather thin, elliptic, ^ inch long or less, hairy on the veins 

 beneath, sharply serrate ; flowers in axillary clusters, the color uncer- 

 tain. — Mountains of Central and North-western Mexico. 



19. C. DEPRESSUS, Benth. Stout and very rigid, tomentose ; leaves 

 thick, dtinsely tomentose beneath, elliptical, |-| inch long, mostly 

 rounded at each end, glandular-serrulate ; flowers in mostly terminal 

 clusters, color uncertain. — Central Mexico. 



* * Leaves pinnately veined. (Forms of C. dentatus might be re- 

 ferred to this group.) 



20. C. SPiNOSUS, Nutt. Becoming a small tree, 20-30 feet high, 

 branchlets rigid and somewhat spiny, glabrous or nearly so ; leaves 

 subcoi'iaceous, entire, oblong, 9-15 lines long, obtuse or retuse, sub- 

 cuneate at base, on slender petioles 2-4 lines long ; flowers deep blue, 

 in a thyrse or in simple racemes, very fragrant ; fruit 2 J— 3 lines in 

 diameter, resinously coated. — From Santa Barbara to Los Angeles, 

 commonly known as "Redwood;" Nuttall, Parry, Brewer (n. 56, 74, 

 255, 287). 



21. C. PAPILL0SU3, Torr. & Gray. More or less subhispidly vil- 

 lous or tomentose, 4—6 feet high ; leaves glandularly serrulate, the upper 

 surface glandular-papillose, narrowly oblong, obtuse at each end, 1-2 



VOL. X. (x.s. II.) 22 



