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Pine Hill Ceanothus
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Ceanothus roderickii
  

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About Pine Hill Ceanothus (Ceanothus roderickii) Ceanothus roderickii is a rare species of shrub in the buckthorn family Rhamnaceae known by the common name Pine Hill ceanothus. It is endemic to western El Dorado County, California, where it grows in the chaparral and woodlands of the Sierra Nevada foothills, such as the Pine Hill Ecological Reserve. It is named after 20th century California flora explorer, botanist, and arboretum director Wayne Roderick. This rare shrub is up to about 3 meters wide and flat, forming low brambles or mats. The grayish brown stems root at nodes as they grow horizontally along the ground. The tiny evergreen leaves are oppositely arranged. Each is only about a centimeter long, widely lance-shaped and smooth along the edges or sometimes toothed near the tip. The top surface is green and hairless and the underside is somewhat woolly. The inflorescence is a small cluster of white to pale blue flowers. The fruit is a capsule about half a centimeter long, sometimes bearing small horns on top. Habitat. Ceanothus roderickii is found almost exclusively on soils of gabbro origin in the Pine Hill Geological Formation. It is a federally listed endangered species. This endangered plant was first collected in 1956 near Shingle Springs. It is threatened by several factors, including suppression of the wildfire it requires for reproduction, off-road vehicles, road maintenance and construction, and development. There are ten to twenty remaining occurrences.
Plant Description
Plant Type
Shrub

Flower Color
White

Native Status
Natural Setting
Elevation ?
638' - 2013'

Annual Precip. ?
30.0" - 34.6"

Summer Precip. ?
0.52" - 0.61"

Coldest Month ?
46.9° F - 48.6° F

Hottest Month ?
72.0° F - 73.7° F

Humidity ?
1.95 vpd - 22.17 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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