BUCKTHORN FAMILY. 257 



to oblong, J to 1 in. long; flowers blue, 1 to 1.] lines broad; capsules 

 IJ lines broad, smooth, conspicuously lobed, crested. 



Rather common in the seaward and middle Coast Eanges north of 

 San Francisco Bay: Mt. Tumalpais; Sonoma; Howell Mt.; 51 1. St. 

 Helena, and northward to Westport, iXendocino Co. Apr.-Maj', or 

 flowering late in the season, the inflorescence then short-spicate and 

 interrupted below. 



6. C. dentatus T. & G. Low densely branched shrub with 

 reddish brown branchlets, the young twigs tomentose; leaves elliptical 

 or narrower, rounded at both ends or appearing retuse or subtruncate 

 from the infolding of the apex, dark brown and waxen on the upper 

 surface, light colored and pubescent beneath, papillate on and near 

 the margin, 2 to 5 or 6 lines long; inflorescence subglobose, very 

 tomentose; flowers blue; capsule slightly crested, scarcely lobed, 2 

 lines in diameter. 



Santa Cruz Mountains. 



7. C. papillosus T. & G. Habit of the last and diflering little 

 from it; leaves often slightly cordate at base, the whole upper surface 

 closely glandular-papillate, 1 in. long or less, sometimes as much as 2 

 in. long; inflorescence more oblong, about 1 in. long; peduncles naked, 

 solitary or clustered; capsules rather less than 2 lines in diameter. 



Santa Cruz Mountains. May. 



8. C. sorediatus H. & A. Erect shrub, 4 to 7 ft. high, with 

 rigid divaricate branchlets; branchlets sparingly villous, at length 

 olive-color or purplish; leaves ovate or elliptic-ovate, green above, 

 paler and slightly pubescent beneath with appressed hairs, glandular- 

 denticulate, J to 1 (or less commonly IJ) in. long, on petioles a line 

 or two long; racemes 1 or 2 (terminal or subterminal) on each branch- 

 let, ovate or broadly oblong in outline, i to 1 in. long; flowers blue 

 or almost white; capsule lobed, crested, '2 to 2J lines in diameter. 



Very common in the Coast Kanges, the individuals disposed to 

 associate, and, at flowering time, often coloring the north canon sides 

 in patches: Vaca Mountains; Caux's Knob, west of St. Helena; 

 Howell Mountain; Oakland Hills; Mt. Diablo; and southward. 

 Mar. -Apr. 



9. C. incanus T. & G-. Tall shrub with very glaucous branchlets, 

 these thick and stout and almost spur-like; leaves elliptic to ovate, 

 acute or obtuse, rounded at base, dark brown above, strongly S-nerved 

 and pale (with a fine close indument) beneath, 1 to IJ in. long; petioles 

 2 or 3 lines long; inflorescence finely velvety, 2 or 3 in. long or less; 

 flowers white; capsule thickly warty, shallowly lobed at top, 2J lines 

 in diameter. 



Pelton and Ben Lomond (Santa Cruz Co.) to Mt. St. Helena; 

 Lake and Mendocino Cos. 



10. C. cuneatus Nutt. Nuttall's Ceanothtjs. Eigid divari- 

 cately branched shrub, 5 to 8 ft. high, with gray bark; branchlets stout 

 and short, those on a branch often very unequal and frequently inter- 

 ruptedly disposed; leaves oblong-obovate to broadly obovate, entire, 



19 



