70 RHAMNACEAE 



5-15 mm. long, oblong-elliptic, truncate or dentate at apex, the notch usually accentuated by the 

 irregularly revolute margin, upper surface dark green and hirsutulous, pale or the midvein some- 

 what impressed, lower surface tomentose and sometimes also somewhat hirsutulous ; panicles 

 simple, densely flowered, cylindric or subglobose, mostly less than 2 cm. long ; peduncle 1-3 cm. 

 long; flowers deep violet-blue; capsule shallowly lobed, 3.5 mm. broad, with narrow crests. 



Usually in sandj' or gravelly soil, Upper Sonoran and Transition Zones; California near the coast from 

 Santa Cruz County to northern San Luis Obispo County. Type locality: probably near Monterey. Collected 

 by Douglas. March-April. 



13. Ceanothus diversifolius Kell. Pine-mat. Fig. 3123. 



Ceanothns diversifolius Kell. Proc. Calif. Acad. 1:58. 1855. 

 Ceanothus decumbcns S. Wats. Proc. Amer. Acad. 10: 335. 1875. 



Prostrate shrubs with reddish or green, pubescent and sparingly verrucose branchlets. Leaves 

 5-15 mm. long, oblong-elliptic to broadly elliptical, obtuse or rounded at base, broadly obtuse to 

 subacute at apex, the margins plane or obscurely and irregularly revolute, beset with slender- 

 stalked glands, dull green and sparsely strigose above, whitened and hirsutulous-tomentose be- 

 neath ; peduncles 3-4 cm. long, leafless, slender, hirsutulous ; flowers in a short few-flowered 

 raceme, pale blue ; capsule slightly lobed, 3 mm. broad, smooth with low narrow crests. 



Open coniferous forests, Arid Transition Zone; Inner North Coast Ranges and the Sierra Nevada, Cali- 

 fornia. Type locality: Placerville, California. April-May. 



Ceanothus serrulatus McMinn, Madrono 2: 89. 1933. Prostrate, forming mats, the branches often rooting. 

 Leaves alternate or a few opposite near the ends of young branchlets, elliptic to elliptic-oblanceolate, 1-2 cm. 

 long, serrulate, prominently veined beneath and with sunken pits between the reticulations, glabrous above, 

 tomentulose beneath; flowers in short racemes, white or pale blue; fruit unknown. A local plant found in the 

 Lake Tahoe region associated with C. prostratus, C. cordulatiis, and C. vclutinus. As it combines characters 

 of Euceanothus and Cerastes sections of the genus it is possibly a sterile hybrid between C. vclutinus and C. 

 prostratus. Type locality: between Emerald I3ay and Cascade Lake, Eldorado County, California. 



14. Ceanothus Lemmonii Parry. Lemmon's Ceanothus. Fig. 3124. 



Ceanothus Lemmonii Parry, Proc. Davenp. Acad. S: 192. 1889. 



Low spreading shrub, 3-6 dm. high, with gray bark; branches slender and elongated but 

 rather rigid, the branchlets short, villous-tomentose and glandular. Leaves 8-25 mm. long, 

 oblong-obovate to elliptic-ovate, the very minute or obscure teeth tipped with stalked glands, 

 upper surface dull green, minutely and sparsely strigose, the lower surface pale green, rather 

 densely villous-tomentose, the veins more prominent than in related species; peduncles 2-2.5 cm. 

 long, terminating the short leafy lateral branchlets; racemes 1.5-3 cm. long; flowers violet-blue; 

 capsule 3.5 mm. broad, rather deeply lobed, the dorsal crests rather prominent. 



Open coniferous forests. Arid Transition Zone; Trinity and Lake Counties and northern Sierra Nevada 

 from Shasta County to Eldorado County, California. Type locality: Johnson's Ranch near Quincy, Placer 

 County, California. April. 



15. Ceanothus foliosus Parry. Wavy-leaved Ceanothus. Fig. 3125. 



Ceanothus foliosus Parry, Proc. Davenp. Acad. 5: 172. 1889. 



Ceanothus diversifolius var. foliosus K. Brandg. Proc. Calif. Acad. II. 4:201. 1894. 



Low erect shrub, 1 m. or less high, the branches pubescent and glandular, flexuous. Leaves 

 oblong-elliptic to broadly elliptic, 5-15 mm. long, the margins glandular-denticulate and somewhat 

 undulate, upper surface dark green and sparsely strigose-pubescent, the lower surface pale green 

 and sparsely villous-pubescent, especially on the veins ; flowers in short simple panicles or racemes 

 terminating the lateral leafy branchlets, deep violet-blue ; capsules 3 mm. broad, 3-lobed, with low 

 narrow crests. 



Mountain slopes, mainly Transition Zone; California Coast Ranges, Humboldt and Lake Counties to Santa 

 Cruz County. Type locality: near St. Helena, California. April. 



Ceanothus foliosus var. vineatus McMinn, Ceanothus 221. 1942. Low shrub with some of the branches 



procumbent and others erect-arching. Leaves broadly elliptic to obovate. 1-2 crn. long,^ dark green and siiaringly 

 pubescent above, paler beneath with scattered hairs on the veins. Locally distributed in Mendocino and Sonoma 

 Counties. Type locality: near the Vine Hill Schoolhouse, Sonoma County. 



Ceanothus foliosus var. medius McMinn, op. cit. 222. 1942. Erect shrub with somewhat arching branches, 

 0.5-2 m. high. Leaves narrowly to broadly elliptic, dull green, finely pilose and glandular above, gray and 

 densely pubescent beneath, glandular-denticulate. Edges of chaparral or burned-over forest areas, in the Coast 

 Ranges of Santa Clara, Monterey, and San Luis Obispo Counties, California. Type locality: Cuesta Pass, San 

 Luis Obispo County. 



16. Ceanothus austromontanus Abrams. Cuyamaca Ceanothus. Fig. 3126. 



Ceanothus austromontanus Abrams, Bull. N.Y. Bot. Card. 6:412. 1910. 



Low erect shrub, 1 m. high or less, the branches reddish or grayish brown and glandular. 

 Leaves oblong to narrowly ovate, 8-12 mm. long, glandular-denticulate, dark green and sparsely 

 strigose above, pale green beneath and pubescent on the veins ; peduncles 3-5 cm. long ; racemes 

 a third to half as long ; flowers violet-blue ; calyx-lobes broadly triangular, nearly 2 mm. long ; 

 capsule 3 mm. broad, very shallowly lobed, dorsal crest inconspicuous. 



Open coniferous forests, Arid Transition Zone; Cuyamaca Mountains, San Diego County, California. Type 

 locality: between Julian and Cuyamaca Lake, California. April-May. 



