Ceanothus thyrsiflorus

J. F. Eschscholtz Mem. Acad. Sci. St. Petersb. ser. 6, 10:285. 1826

blue blossom

Ceanothus thyrsiflorus J. F. Eschscholtz var. repens, H.E. McMinn;


Habit: Shrubs to 6 m tall.

Stems: prostrate to erect, not rooting at nodes; twigs green, angled, smooth, glabrous, flexible.

Leaves: evergreen, alternate; not clustered; stipules thin, deciduous; petioles 3--13 mm; blades oblong-ovate to widely elliptic, 1.0--5.0 x 0.5--1.6 cm; bases cuneate, 3-veined, margins not revolute, +/- gland-toothed, tips obtuse to ac ute, abaxially pale green, sparse-hairy on unusually prominent veins, puberulent between or not, adaxially dark green, glabrous, plane or somewhat concave.

Inflorescences: terminal, raceme- or panicle-like, 2.5--8.0 cm.

Flowers: deep blue, light blue or almost white.

Fruits: flattened-globose, 3.0--4.0 mm broad, usually glandular-sticky, horns 0; valve crests 0.

Cytology: 2 n = 24 (M. A. Nobs, 1963)

Flowering: in spring to early summer.

Habitat: wooded slopes, canyons; < 600 m.

Range: Calif. [NCo, KR, NCoRO, SnFrB, SCoRO], Oreg. View Distribution Map.

Other Information:

Prostrate shrubs from central, coastal Calif. have been called C. thyrsiflorus var. repens H.E. McMinn.

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 22:38:20 PST