Ceanothus oliganthus

T. Nuttall ex J. Torrey & A. Gray Fl. N. Amer. 1:266. 1838


Description:

Habit: Shrub often tree-like 1.2--3.0 (6.0) m.

Stems: erect, not rooting at nodes; twigs red-brown, purplish, or gray-green, round, may be ridged, warty or smooth, +/- glabrous, puberulent or villous, flexible or rigid, sometimes +/- spinescent.

Leaves: evergreen, alternate; not clustered; stipules thin, deciduous; petioles 3--8 mm mm; blade ovate, elliptic, to elliptic-oblong, 0.8--3.9 x 0.4--2.5 cm, bases cuneate, rounded or sub-cordate, 3-veined, margins not revolute, minutely gland-toothed, tips obtuse, rounded or acute, abaxially pale green, scattered long hairs especially on veins, adaxially dark green, +/- glabrous or with scattered long hairs, plane.

Inflorescences: axillary or terminal, interrupted or not, raceme-like loose or dense clusters, 1.0--5.2 cm.

Flowers: deep blue, purplish tinged, to nearly white.

Fruits: deeply 3-lobed, depressed at apex, 3--4 mm broad, smooth or roughened, wrinkled or hairy; valve crests minute to prominent.


Varieties: (2 in the flora): North America

1. Twigs with dense, stiff or soft hairs; leaf-blades pubescent both sides: a. C. oliganthus var. oliganthus

1. Twigs nearly glabrous or slightly pubescent; leaf-blades adaxially +/- glabrous, abaxially pubescent: b. C. oliganthus var. sorediatus


a. Ceanothus oliganthus T. Nuttall, Torr. & Gray. Fl. N. Amer. 1:266. 1838 var. oliganthus

hairy ceanothus

C. oliganthus T. Nuttall var. orcuttii , (C. C. Parry) W. L. Jepson

Description:

Habit: Shrubs often tree-like 1.2--3.0 m.

Stems: erect, twigs +/-red-brown, may be striated, warty or smooth, villous, flexible or rigid, not spinescent.

Leaves: evergreen, alternate; stipules thin, deciduous; petioles 3--8 mm mm; blade ovate, elliptic, to elliptic-oblong, bases cuneate, rounded or sub-cordate, 1.3--3.8 x 0.4--2.5 cm, bases cuneate, rounded or sub-cordate, 0.8--2.6 x 0.7- -1.9 cm, bases cuneate, rounded or sub-cordate, 3-veined, margins minutely gland-toothed, tips obtuse, rounded or acute, abaxially pale green, scattered long hairs especially on veins, adaxially dark green, with scattered long hairs, plane.

Inflorescences: axillary or terminal, interrupted, raceme-like loose or dense clusters, 1.0--5.2 cm long.

Flowers: usually deep blue or purple varying to whitish.

Fruits: deeply 3-lobed, depressed at apex, 4 mm broad, smooth or roughened, sometimes wrinkled or hairy; valve crests prominent.

Cytology:

Flowering: in early spring

Habitat: dry, brushy slopes; below 1300 m.

Range: Calif. (SCoR, TR, PR.) . View Distribution Map.


Other Information:

Some plants in s Calif. with flowers pale blue; fruits very wrinkled, stickier, hairy have been called C. oliganthus var. orcuttii (C. Parry) W. L. Jepson.


b. Ceanothus oliganthus T. Nuttall, Torr. & Gray. Fl. N. Amer. 1:266. 1838 var. sorediatus

Jim brush

Ceanothus sorediatus W. J. Hooker & G. A. W. Arnott

Description:

Habit: Shrub often tree-like 1.2--3.0 m.

Stems: erect, twigs usually gray-green to purplish, round, may be striated, warty or smooth, +/- glabrous to puberulent, rigid, nearly spinescent.

Leaves: evergreen, alternate; stipules thin, deciduous; petioles 3--8 mm mm; blade ovate, elliptic, to elliptic-oblong, bases cuneate, rounded or sub-cordate, 3-veined, margins minutely gland-toothed, tips obtuse, rounded or acute, abaxi ally pale green, scattered long hairs especially on veins, adaxially dark green,+/- glabrous, plane.

Inflorescences: axillary or terminal, not interrupted, raceme-like, dense clusters, 1.0--4.0 cm long.

Flowers: pale to deep blue.

Fruits: deeply 3-lobed, depressed at apex, 3--4 mm broad, smooth, glabrous; valve crests minute.

Cytology: n = 12 (M. Nobs in H.E McMinn, 1942)

Flowering: in spring

Habitat: dry, brushy slopes, below 1000 m.

Range: Calif. [NCoR, SnFrB, SCoR, TR.] . 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: Sunday, 03-Mar-1996 22:25:28 PST

schmidtc@bcc.orst.edu