Ceanothus cordulatus Kellogg
Mountain whitethorn, Snow bush, Whitethorn ceanothus
Rhamnaceae (Buckthorn Family)
USDA Symbol: CECO
Mountain whitethorn or snow bush is an intricately branched, spiny, spreading shrub, 3-6 ft. tall and up to 8 ft. wide, with smooth, whitish bark and velvety, blue-green leaves. Fragrant, white flowers occur in dense clusters.
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Plant CharacteristicsDuration: Perennial
Size Class: 6-12 ft.
Bloom InformationBloom Color: White
Bloom Time: May , Jun , Jul
DistributionUSA: CA , NV , OR
Native Distribution: CA & NV, n. to OR
Native Habitat: Dry, open flats & slopes; 3000-9500 ft.
Growing ConditionsWater Use: Low
Light Requirement: Sun
Soil Moisture: Dry
CaCO3 Tolerance: High
Soil Description: Dry, rocky soils.
BenefitConspicuous Flowers: yes
Value to Beneficial InsectsSpecial Value to Native Bees
Supports Conservation Biological Control
This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.
Butterflies and Moths of North America (BAMONA)Ceanothus cordulatus is a larval host and/or nectar source for:
Pacuvius Duskywing |
Learn more at BAMONA
PropagationDescription: Layering, cutting or seed may all be effective means of propagation.
Seed Collection: Because dry capsules disperse their seed abruptly with a sudden ejection, it may be necessary to tie cloth bags around the clusters of capsules to catch the seeds.
Seed Treatment: A hot water treatment may be beneficial. (Bring water to a boil and then steep the seeds for 10-15 minutes.)
Commercially Avail: yes
Find Seed or Plants
Find seed sources for this species at the Native Seed Network.
View propagation protocol from Native Plants Network.
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Native Seed Network - Corvallis, OR
BibliographyBibref 1186 - Field Guide to Moths of Eastern North America (2005) Covell, C.V., Jr.
Bibref 1185 - Field Guide to Western Butterflies (Peterson Field Guides) (1999) Opler, P.A. and A.B. Wright
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Recommended Species Lists
Find native plant species by state. Each list contains commercially available species suitable for gardens and planned landscapes. Once you have selected a collection, you can browse the collection or search within it using the combination search.View Recommended Species page
Additional resourcesUSDA: Find Ceanothus cordulatus in USDA Plants
FNA: Find Ceanothus cordulatus in the Flora of North America (if available)
Google: Search Google for Ceanothus cordulatus
MetadataRecord Modified: 2007-01-01
Research By: TWC Staff