Ceanothus andersonii C. C. Parry; Ceanothus californicus A. Kellogg; C. integerrimus W. J. Hooker & G. A. W. Arnott var. californicus , (A. Kellogg) G. T. Benson; Ceanothus integerrimus W. J. Hooker & G. A. W. Arnott var. macrothyrsus (J. Torrey) G. T. Benson; Ceanothus integerrimus W. J. Hooker & G. A. W. Arnott var. puberulus (E. L. Greene) L. Abrams;
Stems: ascending-erect, not rooting at nodes; twigs yellow- to pale green, round, smooth, glabrous to +/- strigose, flexible.
Leaves: deciduous, alternate, not clustered; stipules thin, deciduous; petioles to 15 mm; blades lanceolate, elliptic or +/- oblong to broadly ovate, 2.5--8.0 x 1.0--3.9 cm; bases rounded, 1 or 3-veined, margins not revolute, usually en tire or minutely denticulate towards tip, tips acute to obtuse, abaxially pale green, +/- pubescent, especially on major veins, adaxially light green, +/- glabrous to pubescent, plane.
Inflorescences: usually terminal,raceme-like, 4.0--15.0 cm; flower clusters usually stalked, some single clusters axillary in leaflike bracts.
Flowers: white, pale to dark blue, rarely pink.
Fruits: globose to trihedral, summit +/- depressed, 4--5 mm broad, sticky, horns 0; valves minutely crested.
Cytology: n = 12 (M. A. Nobs in H. E. McMinn 1942)
Flowering: in spring--summer.
Habitat: Dry slopes and ridges; 300-2100 m.
Range: Ariz, Calif., N.Mex, Oreg., Wash. View distribution map.
Coile in her unpublished doctoral dissertation dealing with the deciduous ceanothuses, placed all of the Ceanothus integerrimus varieties into synonomy with the species. [N. C. Coile 1988]
If you have any comments or information regarding this species, please send mail to Dr. Schmidt.