
Ceanothus L. s is a genus of about 50–60 species of shrubs or small trees in the family Rhamnaceae. Common names for members of this genus are California Lilac, Wild Lilac, and Soap Bush. `Ceonothus` comes from a Greek word meaning `spiny plant`. The genus is confined to North America, with the center of its distribution in California. Some ...
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http://en.wikipedia.org/wiki/Ceanothus

genus of North American shrubs, of the buckthorn family (Rhamnaceae), comprising about 55 species. The leaves are alternate or opposite. The very ... [1 related articles]
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http://www.britannica.com/eb/a-z/c/40

(Blueblossom, California Lilac, Ceanothus, Creeping Blueblossom, Squaw Carpet) This group consists of about 55 evergreen and deciduous creepers, shrubs and small trees that grow wild throughout the U.S., Canada, and Mexico south to Guatemala. Ceanothus are commonly known as California Lilacs, as many species are native of that state. Most Ceanothus...
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http://www.encyclo.co.uk/local/10004

any North American shrub or small tree of the largely western genus Ceanothus, having clusters of small white or blue flowers.
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https://www.infoplease.com/dictionary/ceanothus
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