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Calistoga Ceanothus
( Ceanothus divergens )
Ceanothus divergens
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Calistoga Ceanothus (Ceanothus divergens)
1 Nurseries Carry This Plant
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Ceanothus divergens
, commonly known as Calistoga ceanothus, is a rare evergreen shrub in the Rhamnaceae family. It is found in just a few locations in the Northern California Coast Ranges of California at altitudes of less than 500 meters. Due to its rarity in the wild, it is included on CNPS list 1b.2. This plant has a growth habit described as ascending to erect and may attain a height of 3 ft. The plant's preferred habitat is on shrub-covered, rocky, volcanic slopes. The hermaphrodite blue or purple flowers bloom in April and May. The sub-globose fruits are five to six millimeters in diameter. This plant is rarely seen in cultivation and not often available for sale.
Plant Description
Plant Type
Shrub
Size
1.6 - 3 ft tall
3 ft wide
Growth Rate
Moderate
Dormancy
Evergreen
Fragrance
Fragrant - Pleasant
Flower Color
Blue, Purple, Red
Flowering Season
Winter, Spring
Wildlife Supported
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
Full Sun
Moisture
Very Low
Nurseries
Carried by 1
Ease of Care
Moderately Easy
Cold Tolerance
Tolerates cold to 10° F
Soil Drainage
Fast
Soil Description
Typically rocky soils
Common uses
Bank Stabilization, Deer Resistant, Bird Gardens, Butterfly Gardens, Bee Gardens
Companion Plants
Use with any chaparral plants of the northern Coast Ranges
Propagation
?
For propagating by seed: Hot water; then 2-3 mos. stratification may improve germination.
Natural Setting
Site Type
Dry rocky chaparral slopes of Marin, Sonoma and Napa Counties
Climate
Annual Precipitation: 15.6" - 61.3", Summer Precipitation: 0.23" - 0.83", Coldest Month: 42.1" - 49.7", Hottest Month: 62.1" - 74.3", Humidity: 0.48" - 22.04", Elevation: 24" - 4310"
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Calistoga Ceanothus
Ceanothus divergens
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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