BUCKTHORN FAMILY 



463 



Hill slopes, 1800 to 3500 feet : Sierra Nevada foothills from Placer Co. to Shasta 

 Co., thence west to Trinity Co. Apr.-May. 



Locs. — Sierra Nevada: Colfax, Sonne; Grass Valley, Bigelow; Rose Sprs., Placer Co., M. H. 

 Gates; Eough and Ready, Nevada Co., Jepson 14,034; American Valley, Plumas Co., Lemmon; 

 Stirling, Butte Co., Heller 10,810; Forest Ranch, Butte Co., Heller 11,371; Morley sta.. Oak Run, 

 Shasta Co., M. S. Baker 383 ; Cedar Run, Shasta Co., BaTcer ^ Nutting. Trinity Co. : Hay Fork 

 Mt., Tracy 6433; Weaverville (n. of), H. S. Yates 310. 



Refs. — Ceanothus lemmonii Parry, Proc. Davenp. Acad. 5:192 (1889), type loc. Johnson's 

 ranch near Quincy, Lemmon; Jepson, Man. 617 (1925). 



3, C, foliosus Parry. Scrub Ceanothus. Depressed shrub (I/2 to 1 foot 

 high) , commonly dense at base, with horizontally spreading or diffuse branches 1% 

 to 3 feet long, or in chaparral often erect and 2 to 3 

 feet high or taller; branchlets often long, straight, 

 shortly villous; leaves commonly with smaller ones 

 fascicled in their axils, the blades broadly oblong, 

 mostly obtusish, undulate or somewhat infolded lon- 

 gitudinally, quite glabrous or obscurely hairy on the 

 veins beneath, 2 to 6 (or 10) lines long, upper surface 

 dark green, lower lighter green or whitish or glau- 

 cous, the minute teeth of the margin tipped with 

 glands; petiole distinct but very short; panicles sim- 

 ple, globose to oblong, y^ to 1 inch long, the peduncles 

 naked, 2 to 5 (or rarely 9) lines long; flowers blue; 

 capsules IV2 lines broad, smooth, reddish, lobed, 

 crested. 



Exposed ridges and rocky slopes, 200 to 3500 

 feet : Coast Ranges from Mendocino Co. to the Santa 

 Cruz Mts. Apr.-May. 



Habit note. — Ceanothus foliosus is commonly disposed to 

 be procumbent or semi-prostrate, or at most but 2 or 3 feet high, 

 especially on rocky ridges. However, on the Mendocino coast 

 near Kenny, where it forms pure colonies, it may become very 

 slender and erect and up to 16 feet high. Nodules are well- 

 developed on its root system and were first noted by us on Mt. 

 Tamalpais in 1912 (cf. fig. 227). 



Locs. — Jackson Valley, nw. Mendocino Co., Jepson 1864 ; Forty Dollar Mt., Miyakma Range, 

 Jepson 9242 ; betw. Comptche and Low Gap, Mendocino Co., Jepson 2171 ; Mt. Hanna, Lake Co., 

 Jepson 14,021; Mt. St. Helena, Jepson; Franz Valley grade near Calistoga, Jepson 14,019; 

 Howell Mt., Jepson 5312; Mt. Tamalpais, Jepson 1192b; Greeninger Creek, w. of Gilroy, Jepson 

 9691. 



Refs. — Ceanothus foliosus Parry, Proc. Davenp. Acad. 5 :172 (1889), type loc. "upper Napa 

 Valley" (that is, in the mountains near Calistoga), Parry; Jepson, Fl. W. Mid. Cal. 256 (1901), 

 ed. 2, 254 (1911), Man. 617, fig. 617 (1925). C. diversifolius var. foliosus K. Bdg. Proc. Cal. 

 Acad. ser. 2,4:201 (1894). 



Ceanothus lobbianus Hook. Bot. Mag. t. 4811 (1854), type from Cal., Lobb (the large 

 single leaf figured on the corner of the plate in the Botanical Magazine illustration belongs, as 

 evidenced by the Kew Herbarium, to a sterile shoot gathered by Lobb). C. dentatus var. lobhi- 

 anus Jepson, Man. 618 (1925). Bush; leaf -blades oblong, green above, olive-color beneath, 

 glandular-serrulate, nearly glabrous, 7 to 14 lines long; peduncles 1^/^ to 2 lines long; panicles 1 

 to 2% inches long; capsules 1% lines wide. — Santa Cruz Mts., Jepson 13,434; Empire grade, n. 

 of Santa Cruz, Clevenger. Knowledge of this form is limited, but it is perhaps nearest C. foliosus. 



4. C. austromontanus Abrams. Small-pod Ceanothus. Erect shrub 4 to 8 

 feet high, similar to C. foliosus; capsules shallowly lobed, commonly without con- 

 spicuous crests, 1% lines wide. 



Dry mountain slopes in coniferous woods, 3500 to 5000 feet : Cuyamaca Mts. 



Refs. — Ceanothus austromontanus Abrams, Bull. N. Y. Bot. Gard. 6:412 (1910), type 

 loc. betw. Julian and Cuyamaca, San Diego Co., Abrams 3966; Jepson, Man. 617 (1925). 



Fig. 227. Ceanothus foli- 

 osus Parry; root tubercles. 

 X 1%. 



