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Ceanothus oliganthus var. oliganthus
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Hairy Ceanothus
( Ceanothus oliganthus var. oliganthus )
Ceanothus oliganthus var. oliganthus
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Hairy Ceanothus (Ceanothus oliganthus var. oliganthus)
1 Nurseries Carry This Plant
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Hairy Ceanothus (
Ceanothus oliganthus
var. oliganthus) is a native shrub in the Rhamnaceae (Buckthorn) family. It is one of three recognized varieties of the species
Ceanothus oliganthus
. It grows primarily in the coastal hills and mountains of southern and central California, from Santa Barbara County to Los Angeles County and into Baja. It tends to grow in dry slopes, at elevations from 0-4300 feet. This is a large, erect shrub approaching 3 meters in height. The evergreen leaves are alternately arranged and may be up to 4 centimeters long. They are dark green on top, paler and hairy on the underside, and are edged with hairy teeth. The flower cluster is a series of clusters of blue or purple flowers. The fruit is a capsule which is generally smooth and not hairy.
Plant
Ceanothus oliganthus
var. oliganthus on rocky slopes, particularly north facing ones in the southern, drier parts of its range. This plant is fairly sensitive to summer water. Best to avoid all direct summer water after it's first year, though it will be happiest if it can stretch its roots out to a damper or irrigated area 10 feet away or so. This plant likes full sun but tolerates part shade. For further information about the species, please refer to
Ceanothus oliganthus
.
Plant Description
Plant Type
Shrub
Size
10 ft tall
12 ft wide
Dormancy
Summer Semi-Deciduous, Evergreen
Fragrance
Fragrant - Pleasant
Flower Color
Blue, Purple
Flowering Season
Winter, Spring
Wildlife Supported
Various insects and birds. It is host plant to the following butterflies: Spring Azure, Echo Blue, Pacuvius Duskywing, California Tortoiseshell, Pale Swallowtail, and Hedgerow Hairstreak.
Butterflies & moths hosted ( 77
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
Sun
Part Shade, Full Sun
Moisture
Very Low
Summer Irrigation
Never irrigate once established, Irrigate ~ 1x / mo once established
Nurseries
Carried by 1
Ease of Care
Moderately Easy
Cold Tolerance
Tolerates cold to 15° F
Soil Drainage
Fast, Medium
Soil Description
Tolerates both heavy and sandy soils. Soil PH: 6.0 - 8.0
Common uses
Bank Stabilization, Hedges, Bird Gardens, Butterfly Gardens, Bee Gardens
Companion Plants
Sticky Monkeyflower
(
Mimulus aurantiacus
),
California Sagebrush
(
Artemisia californica
),
Deerweed
(
Lotus scoparius
),
Brittlebush
(
Encelia species
), Sage (
Salvia species
), Manzanita (
Arctostaphylos species
), Oaks (
Quercus species
),
Lodgepole Pine
(
Pinus contorta
),
Ponderosa Pine
(
Pinus ponderosa
),
Red Fir
(
Abies magnifica
),
Yucca species
, native grasses, and
Dudleya species
Propagation
?
For propagating by seed; Hot water treatment
Sunset Zones
?
7, 14*, 15*, 16*, 17*, 18, 19*, 20*, 21*, 22*, 23*, 24*
Natural Setting
Site Type
Dry, rocky slopes, most often along the coastal side of the mountains, frequently on north facing aspect
Climate
Annual Precipitation: 11.5" - 154.9", Summer Precipitation: 0.18" - 1.88", Coldest Month: 39.4" - 55.1", Hottest Month: 62.3" - 81.6", Humidity: 0.79" - 32.12", Elevation: 36" - 6201"
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Hairy Ceanothus
Ceanothus oliganthus var. oliganthus
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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