Ceanothus prostratus Benth.

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Ceanothus prostratus is a species of shrub in the family Rhamnaceae. Common names include prostrate ceanothus, pinemat, and mahala mat. It is native to the Pacific Northwest of the United States where it grows in coniferous forests and open plateaus.

Ceanothus prostratus is a decumbent (or "mat-forming") shrub, generally less than 0.3 meters tall and spreading laterally to up to 3 meters. Its evergreen leaves are oppositely arranged and generally oval in shape with 3-9 sharp teeth along the margins. The inflorescence is umbel-like, with flowers of blue, purple, or lavender that bloom between April and June. Its fruit is small and rounded with horned lobes.

Ceanothus prostratus grows in the understory of mixed conifer forests, from foothills to subalpine areas. It also inhabits open flats and ridges in areas of low chaparral[5] as well as dry interior forest ecosystems. It can be found from elevations ranging between 270–2700 meters above sea level.

Ceanothus prostratus is found throughout the Pacific Northwest, ranging through Washington, Oregon, western Idaho, western Nevada, and south into northern California. The southern extent of its natural range is the central Sierra Nevada mountains. Given its elevational range, this plant is also native to many of the other mountain ranges of the Pacific Northwest, including the Klamaths, Siskiyous, Cascades, and Warner Mountains.

Ceanothus prostratus - Wikipedia

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