RHAMNEiE. 81 



petals minute, cucuUate, bifid : fr. round-obovate, }-^ — J^ in. thick, black, 

 3-seeded : seed obovate.— A northern species, credited to Mendocino Co. 

 in. the "Botany of California;" found near Areata, Humboldt Co., 

 Chesnui tO Drew. 



2. CEANOTHUS, Limixus (Califoknia Lilac). Arborescent, shrubby 

 or suffrutescent, unarmed or spinescent, with petioled leaves and mostly 

 thyrsoidly arranged, caducous-bracted fascicles or cymes of small perfect 

 blue or white flowers. Calyx campanulate, 5-cleft, the lobes acute, con- 

 nivent ; disk thick, adnate to the calyx and base of the ovary. Petals 5, 

 eucullate and arched, on long claws. Stamens 5 ; filaments filiform, long- 

 cxserted. Ovary 3-lobed ; style short, 3-cleft. Fruit 3-lobed and 

 capsular, though coated with a thin layer of bitter resinous pulp ; 

 ultimately separating into 3 unilocular 1-seeded carpels which are 

 elastically dehiscent by the ventral suture. Seeds obovate without a 

 furrow. 



* Leaves aileruale, nienihrarions or thin-coriaceous, glandnlnr-toothed or 



entire ; fruit nnappendged or slightly crested. — Ceanothus proper. 



H- Branches Jie.rible, not spinescent. 



++ Leaves thin, plane, entire. 



1. C. Audersonii, Parry, Proc. Davenp. Acad. v. 172 (1889). A slender 

 graceful glabrous shrub 10 — 15 ft. high, the young branches and twigs 

 terete, the bark smooth, light-green : leaves narrowly oblong, mostly 

 obtuse, }4 — 1% in. long, delicately pinnate-nerved, pale beneath, on 

 short slender petioles : thyrse elongated, lax, on a long leafy peduncle : 

 fl. white, on filiform pedicels : fr. small, smooth. — Santa Cruz Mountains, 

 near Ben Lomond, Anderson, Parry. One of the most beautiful species, 

 and only recently discovered, in a region where men had ceased to 

 expect new shrubs. 



2. C. parvifolius, Trel. Proc. Calif. Acad. 2d ser. i. 110 (1888) : 



C. integerrimus, var. ? parvijiorus, Wats. Proc. Am. Acad. x. 334 (1875). 

 Erect, branched from the base, slender, very leafy, 2 — 3 ft. high ; 

 branches and branchlets terete, pale-green and glabrous : leaves oblong, 

 obtuse or nearly truncate, 3-9 lines long, obscurely 3-nerved from the 

 base and faintly reticulate, wholly glabroiis : thyrse shorter but more 

 lax than in the next, the peduncle leafless : fl. sky-blue or paler. — In 

 open woods of the Sierra Nevada from near the Calaveras Big Trees 

 northward, at a higher altitude than the next, with which it has been 

 confounded, but with which it does not seem to be confluent. In some 

 points it is more like the preceding species. June. 



3. C. integerrimus, H. & A. Bot. Beech. 329 (1840) ; C. Nevadensis, 

 KeU. Proc. Calif. Acad. ii. 152. fig. 45 (1863). Tall, loosely branching and 

 sometimes arborescent, 5 12 ft. high, the branchlets green, more or less 



