Ceanothus spinosus

T. Nuttall ex J.Torrey & A. Gray Fl. N. Amer. 1:267. 1838



Habit: Shrubs or +/- tree-like, to 6 m.

Stems: erect, not rooting at nodes; twigs olive-green, round, ridged, glabrous, rigid, usually spinescent.

Leaves: evergreen, alternate; not clustered; stipules thin, deciduous; petioles 4--8 mm; blade elliptic to oblong, 1.3--3.2 x 0.8--1.9, bases cuneate to rounded, 1-veined, margins not revolute, usually entire, tips obtuse to notched, aba xially pale green, glabrous or hairy, esp on midrib adaxially green, glabrous, plane.

Inflorescences: axillary, panicle-like, 4.0--15.0 cm.

Flowers: pale blue to +/- white.

Fruits: globose, 4--5 mm broad, smooth, horns 0 ; valve crests minute or 0.


Flowering: in spring;

Habitat: Chaparral, coastal sage scrub on dry slopes; below 900 m;

Range: Calif. [SCoRO, WTR, PR]; Mexico, n Baja California View Distribution Map.

Other Information:

Under ideal conditions or in cultivation, individuals may not be spinescent. Putatively forms hybrids with C. thyrsiflorus and C. sorediatus. [H.E. McMinn 1942]

If you have any comments or information regarding this species, please send mail to Dr. Schmidt.

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This document was last updated: Sunday, 03-Mar-1996 22:37:01 PST