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Arctostaphylos virgata
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Marin Manzanita
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Arctostaphylos virgata
  

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About Marin Manzanita (Arctostaphylos virgata) Arctostaphylos virgata is a species of manzanita known by the common names Bolinas manzanita and Marin manzanita. It is endemic to Marin County, California, where it is known from only about 20 occurrences in the forests and chaparral of the coastal hills. It is a dominant shrub in some spots in the maritime chaparral plant community at Point Reyes National Seashore. Like many other species in this type of plant community, it is dependent on wildfire and its survival is threatened by fire suppression. Arctostaphylos virgata is a large shrub, reaching at least two meters tall and known to exceed 5 meters in height, becoming treelike. Its twisted branches are covered in deep red bark. The smaller twigs are coated in woolly fibers and studded with glandular bristles which exude sticky resins. The shiny green leaves are rough and sticky in texture, oval to widely lance-shaped, and up to 5 centimeters long. The inflorescence is a dense cluster of urn-shaped manzanita flowers. The fruit is a sticky, bristly drupe about 7 centimeters wide.
Plant Description
Plant Type
Shrub

Max. Height
6.6 - 16.4 ft (2 - 5 m)

Dormancy
Evergreen

Flower Color
Pink, White

Native Status
Natural Setting
Elevation ?
7' - 2553'

Annual Precip. ?
30.6" - 66.0"

Summer Precip. ?
0.34" - 0.53"

Coldest Month ?
46.3° F - 49.7° F

Hottest Month ?
59.0° F - 70.0° F

Humidity ?
0.78 vpd - 15.53 vpd

Landscaping Information
Common uses
Hummingbird Gardens, Bee Gardens

Nursery Availability
Never or Almost Never Available

Nurseries
Other Names
Common Names
Bolinas 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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