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Mt. Vision Ceanothus
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Ceanothus gloriosus var. porrectus
  

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About Mt. Vision Ceanothus (Ceanothus gloriosus var. porrectus) Mt. Vision Ceanothus is one of three recognized varieties of Ceanothus gloriosus. All three varieties are rare, but var. porrectus is the most rare and has the most limited distribution, being restricted to a handful of sites in the vicinity of Pt. Reyes and Tomales Bay. This is an area that receives significant moisture from summer fog. Mt. Vision Ceanothus tends to grow in sandy places, at elevations from sea level to 1,000 feet. It is low growing, forming a mat or low mound. The evergreen leaves are oppositely arranged and up to 5 centimeters long, rounded to oval in shape. The edges are toothed, the teeth sometimes spine-tipped. The flower cluster is bright blue to purple. The fruit is a horned capsule about 4 millimeters wide. Although this plant is native to the north coast, it has been used in other coastal parts of the state if conditions similar to its native habitat can be maintained.
Plant Description
Plant Type
Shrub

Max. Height
3 ft (0.9 m)

Max. Width
8 ft (2.4 m)

Form
Spreading

Fragrance
Fragrant - Pleasant

Growth Rate
Moderate

Dormancy
Evergreen

Flower Color
Blue, Lavender, Purple

Flowering Season
Spring, Winter
Spring
Summer
Fall
Winter


Native Status
Natural Setting
Site Type
Sandy places, bluffs, shrubby slopes, ridges of Marin County

Sun
part Shade

Elevation ?
79' - 1258'

Annual Precip. ?
30.6" - 41.8"

Summer Precip. ?
0.39" - 0.52"

Coldest Month ?
46.8° F - 48.8° F

Hottest Month ?
61.0° F - 67.3° F

Humidity ?
0.90 vpd - 12.72 vpd

Soil Description
Prefers sand or sandstone

Soil Texture
Loamy Sand, Sand, Sandy Loam

Soil PH
5.0 - 7.0

Drainage
Fast

Cold Tolerance(° F)
Tolerates cold to 0° F

Companion Plants
Manzanita (Arctostaphylos species), North Coast Dudleya (Dudleya farinosa), Seaside Daisy (Erigeron species), Seaside Buckwheat (Eriogonum latifolium), Coffeeberry (Frangula californica), Coast Silktassel (Garry elliptica), Lupine (Lupinus species)

Wildlife Attracted
Primarily insects. Plants in the Ceanothus genus are host plants to the Spring Azure, Echo Blue, Pacuvius Duskywing, California Tortoiseshell, Pale Swallowtail, and Hedgerow Hairstreak butterflies.

Landscaping Information
Ease of Care
Moderately Easy

Water Requirement ?
Very Low
Extremely Low
Very Low
Low
Moderate - High


Max. Summer Water ?
2x/month, 3x/month
No Summer Water
1x/month
2x/month
3x/month
1/week
Keep moist


Mulch
Inorganic, Organic with Rocks

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

Nursery Availability
Commonly Available

Other Names
Common Names
Mt. Vision Mountain Lilac, Inverness Ceanothus


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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