336 PROCEEDINGS OP THE AMERICAN ACADEMY 



Report), Stillman, Brewer (n. 1G24), Bolander (n. 6331), and Torrey 

 (n. 69). 



•1— -1— -)— Erect shrubs, the branches usually rigid, divaricate, or spi- 

 nose; flowers in simple racemes or clusters; leaves rather small. 



a. Rarely or never spinose ; leaves glandularly serrulate ; flowers 

 mostly blue, racemose. 



12. C. HiRSUTUS, Nutt. (C. oliganthus, 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 

 apex, 2— li^ inches long, not smooth above ; flowers blue, in simple axil- 

 lary and terminal racemes 1-3 inches long, or rarely thyrsoid ; fruit 

 unknown. — Dry hills about Santa Barbara and in the Santa Susanna 

 mountains; Nuttall, Wallace, Brewer (n. 214, 289, 297, 298). 



Var. ? GLABER. ( 0. sorediaths, var. glaber, Watson in King's Rep. 

 5.51.) Glabrous throughout or nearly so ; leaves sometimes entire; 

 flowers white. — East Humboldt Mountains, Nevada; Watson (n. 212). 



13. C. SOREDIATUS, Hook. Nearly glabrous, the inflorescence pubes- 

 cent ; leaves smooth above, more or less tomeutose beneath or rarely 

 nearly glabrous, silky on the veins, oblong-ovate, ^li inches long, 

 subcordate or rounded or often acutish at base, acute or obtuse at the 

 apex; flowers blue, in shortly peduncled simple racemes, \-2 inches 

 long ; fruit unknown. — From San Diego to the Sacramento ; Douglas, 

 Bigelow (*S'. incanus of Whipple's Report), Bridges (n. 52), Brewer 

 (n. 286, 1 105), and Bolander (n. 4558), — the latter a form with small 

 leaves densely white-tomentose beneath. 



h. Branches mostly spinose, grayish ; leaves subcoriaceous, usually 

 entire ; flowers mostly white, racemose. 



14. C. DiVARiCATCS, Nutt. Nearly glabrous ; leaves oblong-ovate 

 to ovate, 3— 1^ inches long, rounded at base, acute or obtuse above, not 

 tomentose beneath ; flowers light blue or white, in subsimple often 

 elongated racemes 1-4 inches long. — California, from San Diego 

 northward ; Douglas, Nuttall, Coulter (n. 122), Wallace, Bigelow 

 (var. eglcmdulosus and (7. integerrimus in part, of Whipple's Report), 

 Parry, Cleveland. Also from the " Snake Country," collected by 

 Tolmie. 



15. C. INCANUS, Hook. Leaves hoaty beneath with a very minute 

 tomentum, broadly ovate to elliptic, |-2 inches long, cuneate to cordate 

 at base, acutish or obtuse at apex ; flowers in short racemes ; fruit over 



