Ceanothus jepsonii

E. L. Greene, Man. Bay Reg. 78. 1894


Description:

Habit: Shrubs to 1.0 dm.

Stems: erect, not rooting at nodes; twigs gray-brown, round, smooth, puberulent, rigid.

Leaves: evergreen, opposite, not clustered; stipules thickened, persistent; petioles 1--3 mm; blades elliptical, 1.0--2.0 x 0.6--1.3 cm, bases rounded,1-veined, margins +/- revolute, undulate, with 8--10 coarse, spiny teeth, tips rounded, abaxially microscopically white-canescent between veins, adaxially yellow-green, glabrous, troughed.

Inflorescences: axillary or terminal, umbel-like, 1.3--2.5 cm.

Flowers: hexamerous to octamerous, pale blue to lavender or white.

Fruits: globose or +/- oblong, 5--6 mm broad, rough, horns prominent, wrinkled; valves crested.

Varieties: (2 in the flora): North America

1. Shrub erect to 1.0 m; flowers white; fruit +/- oblong: a. C. jepsonii var. albiflorus

1. Shrub sprawling-erect to 0.6 m; flowers pale blue to lavender; fruit globose: b. C. jepsonii var. jepsonii.


a. Ceanothus jepsonii

E. L. Greene var. albiflorus J. T. Howell, Leafl. W. Bot. 3:231 1943

Description:

Habit: Shrubs to 1.0 m.

Stems: Stems erect, not rooting at nodes; twigs gray-brown, round, smooth, puberulent, rigid.

Leaves: evergreen, opposite; stipules thickened, persistent; petioles 1--3 mm; blades elliptical, 1.0--2.0 x 0.6--1.3 cm, bases rounded,1-veined, margins +/- revolute, undulate, with 8--10 coarse, spine-like teeth, tips rounded, abaxially white-canescent between veins, adaxially yellow-green, glabrous, troughed.

Inflorescences: axillary or terminal, umbel-like, 1.3--2.5 cm.

Flowers: hexamerous to octamerous, white.

Fruits: +/- oblong, ca. 6 mm broad, horns prominent, wrinkled; valves crested.

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

Flowering: in spring.

Habitat: dry, brush-covered, rocky slopes, serpentine, inner coast range; below 600 m.

Range: Calif. [NCoRH, NCoRI] View Distribution Map.


b. Ceanothus jepsonii

E. L. Greene var. jepsonii

musk brush

Description:

Habit: Shrubs +/- to 6 dm.

Stems: erect, not rooting at nodes; twigs gray-brown, round, smooth, puberulent, rigid.

Leaves: evergreen, opposite; stipules thickened, persistent; petioles 1--3 mm; blades elliptical, 1.0--2.0 x 0.6--1.3 cm, bases rounded,1-veined, margins +/- revolute, undulate, with 8--10 coarse, spine-like teeth, tips rounded, abaxially white-canescent between veins, adaxially yellow-green, glabrous, troughed.

Inflorescences: axillary or terminal, umbel-like, 1.3--2.5 cm.

Flowers: Flowers pale blue to lavender.

Fruits: Fruits globose.

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

Flowering: in spring

Habitat: dry, brush-covered, rocky slopes, serpentine, outer coast range; below 600 m.

Range: Calif. [NCoR, SnFrB] View Distribution Map.


Other Information:

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: Friday, 08-Mar-1996 00:13:42 PST

schmidtc@bcc.orst.edu