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Ceanothus roderickii
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Pine Hill Ceanothus
( Ceanothus roderickii )
Ceanothus roderickii
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Pine Hill Ceanothus (Ceanothus roderickii)
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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
Size
1.6 ft tall
Dormancy
Evergreen
Flower Color
White, Green, Blue
Wildlife Supported
Butterflies & moths hosted ( 41
likely
* )
SHOW ALL
*
Gray Hairstreak
Strymon melinus
Strymon melinus
*
Pale Tiger Swallowtail
Papilio eurymedon
Papilio eurymedon
*
Lorquin's Admiral
Limenitis lorquini
Limenitis lorquini
*
California Tortoiseshell
Nymphalis californica
Nymphalis californica
*
The Brown Elfin
Callophrys augustinus
Callophrys augustinus
*
Pacuvius Duskywing
Erynnis pacuvius
Erynnis pacuvius
*
Hedgerow Hairstreak
Satyrium saepium
Satyrium saepium
Landscaping Information
Common uses
Bank Stabilization, Bird Gardens, Butterfly Gardens, Bee Gardens
Natural Setting
Climate
Annual Precipitation: 30.0" - 34.6", Summer Precipitation: 0.52" - 0.61", Coldest Month: 46.9" - 48.6", Hottest Month: 72.0" - 73.7", Humidity: 1.95" - 22.17", Elevation: 638" - 2013"
Alternative Names
Common Names
: Pine Hill Buckbrush
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Pine Hill Ceanothus
Ceanothus roderickii
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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