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Ceanothus pumilus

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About Dwarf Ceanothus (Ceanothus pumilus) Ceanothus pumilus is a species of shrub in the buckthorn family Rhamnaceae known by the common names dwarf ceanothus and Siskiyou mat. It is native to the mountains of southern Oregon and northern California, where it grows in habitat such as coniferous forest and chaparral, often on serpentine soils. This is a low-lying to flat shrub taking the form of a mat or bramble up to about 2.5 meters wide. The tiny evergreen leaves are oppositely arranged, each just over a centimeter in maximum length. They are firm and ribbed, flat or cupped, hairless on top and generally hairy and paler in color on the undersides. The flower cluster is a small cluster of flowers in shades of blue, lavender, or white. The fruit is a horned capsule about half a centimeter long.
Plant Description
Plant Type

Max. Height
1 ft (0.3 m)


Flower Color
Blue, White, Lavender

Native Status

Natural Setting
Site Type
Dry places

Sun, Part Shade, Shade

Elevation ?
43' - 8171'

Annual Precip. ?
19.9" - 158.4"

Summer Precip. ?
0.58" - 6.12"

Coldest Month ?
32.8° F - 47.7° F

Hottest Month ?
50.6° F - 72.3° F

Humidity ?
0.27 vpd - 21.93 vpd

Sunset Zones ?
1, 2, 3, 4, 5, 6, 7*, 14, 15, 16, 17, 18

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

Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Siskiyou Mat

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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