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Santa Rosa Island Manzanita Back to Plant Page
Arctostaphylos confertiflora

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About Santa Rosa Island Manzanita (Arctostaphylos confertiflora) Arctostaphylos confertiflora is a rare species of manzanita known by the common name Santa Rosa Island Manzanita. This shrub is endemic to California, where it grows on the sandstone bluffs of Santa Rosa Island in the Channel Islands. This manzanita is listed as an endangered species by the United States Government. There are a few individuals in two locations on the island, and most of them are threatened by cattle, elk, and deer, which eat them. This is a small, twisting manzanita with blood red to gray bark and glandular bristles on its branches. The leaves are light, dull green, glandular and hairy or bristly. The small flowers are rounded and milky white, less often pale pink, and bunched densely in inflorescences. The fruits are fuzzy drupes around a centimeter in diameter.
Plant Description
Plant Type

Max. Height
0.33 - 6.6 ft (0.1 - 2 m)


Flower Color
Pink, White

Native Status
Natural Setting
Elevation ?
41' - 1181'

Annual Precip. ?
11.7" - 18.4"

Summer Precip. ?
0.15" - 0.17"

Coldest Month ?
48.6° F - 53.8° F

Hottest Month ?
62.3° F - 68.6° F

Humidity ?
1.46 vpd - 14.19 vpd

Landscaping Information
Common uses
Hummingbird Gardens, Bee Gardens

Nursery Availability
Never or Almost Never Available

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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