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Ceanothus incanus
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Coast Whitethorn
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Ceanothus incanus
  

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About Coast Whitethorn (Ceanothus incanus) Ceanothus incanus is a species of shrub in the buckthorn family Rhamnaceae known by the common name coast whitethorn. It is endemic to California, where it is known from the San Francisco Bay Area through the North Coast Ranges into the Klamath Mountains. This thorny shrub grows erect to approach a maximum height of 4 meters. The woody parts are gray in color and waxy and somewhat hairy in texture. The evergreen leaves are alternately arranged. They are generally oval in shape and usually smooth along the edges, but sometimes minutely toothed. The inflorescence is a panicle-like cluster of white flowers up to about 7 centimeters long. The fruit is a rough, lobed capsule about half a centimeter long containing three seeds. This thorny shrub grows erect to approach a maximum height of 4 meters. The woody parts are gray in color and waxy and somewhat hairy in texture. The evergreen leaves are alternately arranged. They are generally oval in shape and usually smooth along the edges, but sometimes minutely toothed. The inflorescence is a panicle-like cluster of white flowers up to about 7 centimeters long. The fruit is a rough, lobed capsule about half a centimeter long containing three seeds.
Plant Description
Plant Type
Shrub

Max. Height
13.1 ft (4 m)

Dormancy
Evergreen

Flower Color
White

Native Status
Native

Natural Setting
Elevation ?
3' - 7353'

Annual Precip. ?
11.8" - 132.8"

Summer Precip. ?
0.20" - 2.58"

Coldest Month ?
30.4° F - 50.8° F

Hottest Month ?
49.3° F - 74.3° F

Humidity ?
0.04 vpd - 23.57 vpd

Landscaping Information
Common uses
Bank Stabilization, Bird Gardens, Butterfly Gardens, Bee Gardens

Nursery Availability
Never or Almost Never Available


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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