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Arctostaphylos insularis
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Island Manzanita
( Arctostaphylos insularis )
Arctostaphylos insularis
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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11 Nurseries Carry This Plant
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About Island Manzanita (Arctostaphylos insularis)
11 Nurseries Carry This Plant
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Arctostaphylos insularis
is a species of manzanita known by the common name island manzanita. It is endemic to Santa Cruz Island, one of the Channel Islands of California. It grows in chaparral and woodland. This is a large, spreading shrub ordinarily reaching over two meters tall and known to exceed five meters in height. It has waxy, reddish bark and the smaller twigs sometimes have bristly hairy hairs. The leaves are shiny green and smooth, generally oval in shape and slightly convex, and up to about 4.5 centimeters long. The shrub blooms in many dense clustered flower clusters of urn-shaped flowers. The fruit is an orange-brown drupe up to 1.5 centimeters wide. Its long bloom time makes it a good choice for the coastal southern California garden where it will get some moisture from fog drip.
Plant Description
Plant Type
Shrub
Size
6.6 - 16.4 ft tall
10 ft wide
Form
Mounding
Growth Rate
Moderate, Slow
Dormancy
Evergreen
Fragrance
Slight
Flower Color
Pink, White, Orange, Brown
Flowering Season
Winter, Spring
Wildlife Supported
Hummingbirds and insects are attracted to the flowers. Various birds and other animals are attracted to the fruits.
Butterflies & moths hosted ( 3
confirmed
, 11
likely
* )
SHOW ALL
Chionodes trichostola
Chionodes trichostola
Western Avocado Leafroller Moth
Amorbia cuneana
Amorbia cuneana
Coleophora glaucella
Coleophora glaucella
*
Ceanothus Silkmoth
Hyalophora euryalus
Hyalophora euryalus
*
Brown Woodling
Egira perlubens
Egira perlubens
*
Elegant Sphinx Moth
Sphinx perelegans
Sphinx perelegans
*
Orange Tortrix Moth
Argyrotaenia franciscana
Argyrotaenia franciscana
Landscaping Information
Sun
Part Shade, Full Sun
Moisture
Very Low
Summer Irrigation
Max 1x / month once established
Nurseries
Carried by 11
Ease of Care
Moderately Easy
Cold Tolerance
Tolerates cold to -5° F
Soil Drainage
Fast, Medium, Slow
Soil Description
Tolerant of sand and clay. Soil PH: 6.0 - 8.0
Common uses
Hedges, Deer Resistant, Bird Gardens, Hummingbird Gardens, Bee Gardens
Companion Plants
Island companions include
Island Ironwood
(Lyonothamnus fasciculatus ssp. asplenifolius),
Catalina Cherry
(
Prunus ilicifolia
ssp. lyonii),
St. Catherine's Lace
(
Eriogonum giganteum
),
Island Buckwheat
(
Eriogonum arborescens
),
Island Morning Glory
(
Calystegia macrostegia
),
Island Ceanothus
(
Ceanothus arboreus
),
Channel Islands Tree Poppy
(Dendromecon hardordii),
Island Alum Root
(
Heuchera maxima
),
Island Mallow
(
Lavatera Assurgentiflora
), Island
Pitcher Sage
(
Lepechinia fragrans
),
Island Oak
(
Quercus tomentella
), Catalina Island
Gooseberry
(Ribes virburnifolium), and
Santa Rosa Island Sage
(
Salvia brandegeei
)
Propagation
?
By seeds or cuttings
Sunset Zones
?
15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Natural Setting
Site Type
Rocky slopes and coastal bluffs of the northern Channel Islands
Climate
Annual Precipitation: 12.2" - 19.2", Summer Precipitation: 0.14" - 0.26", Coldest Month: 47.4" - 53.8", Hottest Month: 62.7" - 70.8", Humidity: 1.37" - 15.81", Elevation: 27" - 1695"
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Island Manzanita
Arctostaphylos insularis
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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