STUDIES IN CEANOTHUS. lOI 



little from C . microfhy litis, certainly not enough to merit 

 even a varietal name. Certain forms of C. ovatus, as 

 Parry's No. 167 of Mex. Bound. Surv. Coll., make a dis- 

 tinct approach to ser^yllifolius . 



5. Ceanothus integerrimus H. &. A. C Calif or- 

 nictcs,* C . Nevadc7isis,\ C . thyrsijloriis var. macrothyrsnsX 

 and C. Andersonz.§ 



Ceanothus integerrimus; glaber, ramis subangiilatis parce resinoso-visco- 

 sis, foliis 3-costatis submembranaceis oblougo-ellipticis obtusis iutegerrimis 

 snbtus pallidioribiis, pauiciilis elougatis multifloris, floribus glomeratis 

 albis. — A very distinct species, with quite entire leaves, and veiy long 



"Ceanothus Californicus, Kellogg. This species is nearest allied to C 

 Oreganus, hence to contradistinguish it we give the above provisional 

 name. — Branches robust, bright green, glabrous, swelled at the axils, those 

 of the present season's growth thick, tender and succulent; leaves in the 

 young state lanceolate, acute and long acuminate, becoming broadly 

 ovate, cordate at base, acute or sub-acuminate, three-nerved, veins very 

 prominent, lamina thin, entire, glabrous above, glaucous beneath, sparse- 

 ly pubescent, with appressed hairs along the veins. — Stipules conspicu- 

 ous, texture leafy lanceolate-acuminate, numerous short shoots of tender 

 axillary branchlets. Flowers white on long stout lateral branch-like com- 

 pound paniculate peduncles, six inches in length, one or more leaves at 

 the base. Appears to be a deciduous species. [Placerville, E. W. Garvitt.] 

 — Proc. Cal, Acad., i, 55 (1855), ed. 2, p. 54. 



t Ceanothus nevadensis, (Kellogg.) Fig. 45. Stem bright green, similar 

 to the leaves, nearly glabroiis, warted, scarcely angled. — Leaves ovate, sub- 

 acute, mucronate by a conic gland, entire, lamina thin, sub-coriaceous, 

 dull lustrous pitted above (not vai'uished nor resinous); glaucous, reticu- 

 late, and very short appressed pubescent below, three moderately prom- 

 inent ribs from the base; the smaller leaves often ovate-oblong, sub-acute 

 or somewhat obtuse. Petioles very slender, appressed pubescent, half an 

 inch or more in length, a few dark purple conic glands above scattered 

 along the upper third, stipules siibulate, acuminate, ciliate. Panicles 

 •elongated, terminal, five or six inches in length, leafy at the base, second- 

 ary subdivisions very short, filiform, pedicles glabrous like the calyx. 

 Flowers white, small, calyx segments incurved. — Remarks. — This species 

 apf)ears to be closely allied to C. velutinus. But the leaves are not rounded, 

 cordate, nor serrate, neither is the slender elongated racemoid-panicle 

 "thrice compound," nor in the general appearance is it so large and 

 robust. Could the shaded damp and lofty habitat of this plant cause so 

 great difference as we have observed ? The leaves, we observed, are not at 



