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Presidio Manzanita
Arctostaphylos montana ssp. ravenii
  
About Presidio Manzanita (Arctostaphylos montana ssp. ravenii) 3 Nurseries Carry This Plant Presidio Manzanita (Arctostaphylos hookeri ssp. ravenii) is a rare native shrub whose only documented location in the wild is in Presidio Park, San Francisco. It is listed by State and federal agencies as an Endangered Species. The U.S. Fish and Wildlife Service says that only one individual of this subspecies remains in the wild and no wild seedlings of this plant have been observed. However, it has been propagated from seeds and cuttings for conservation purposes, and it is sometimes available for garden use. It was formerly classified as Arctostaphylos hookeri ssp. revenii and some sources may still refer to it by that name.
Plant Description
Plant Type
Plant Type
Shrub

Size
Size
2 ft tall
5 ft wide

Form
Form
Spreading

Dormancy
Dormancy
Evergreen

Flower Color
Flower Color
White

Flowering Season
Flowering Season
Winter, Spring

Wildlife Supported
 


 
Butterflies & moths hosted ( 34 likely * ) SHOW ALL

Landscaping Information
Sun
Sun
Part Shade, Full Sun

Moisture
Moisture
Low

Summer Irrigation
Summer Irrigation
Max 2x / month once established

Nurseries
Nurseries

Soil Drainage
Soil Drainage
Medium

Soil Description
Soil Description
The sole remaining individual is growing on a serpentine outcrop. However, it appears to be tolerant of normal garden soil.

Common uses
Common uses
Deer Resistant, Hummingbird Gardens, Bee Gardens

Companion Plants
Companion Plants
This plant can be used with most other northern chaparral plants. However, due to its rarity in the wild, it would be shown to best advantage when used with other plants commonly found in the vicinity of Presidio Park, such as Yerba Buena (Clinopodium douglasii), Oneleaf Onion (Allium unifolium), Sitka Columbine (Aquilegia formosa), California Mugwort (Artemisia douglasiana), Hairy Ceanothus (Ceanothus oliganthus), Blueblossom (Ceanothus thyrsiflorus), Canyon Dudleya (Dudleya cymosa), Mission Bells (Fritillaria affinis), Broadleaf Stonecrop (Sedum spathulifolium),

Natural Setting
Site Type
Site Type
Presidio Park, San Francisco

Climate
Climate
Annual Precipitation: 24.3" - 27.7", Summer Precipitation: 0.27" - 0.33", Coldest Month: 49.1" - 50.9", Hottest Month: 62.0" - 64.6", Humidity: 1.19" - 9.86", Elevation: 69" - 878"

Alternative Names
Botanical Names: Arctostaphylos hookeri ssp. ravenii
Common Names: Raven's Manzanita


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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