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Taxon  Report  
Arctostaphylos densiflora  Baker
Vine hill manzanita
Arctostaphylos densiflora is a shrub that is native to California, and endemic (limited) to California.
California Rare Plant Rank: 1B.1 (rare, threatened, or endangered in CA and elsewhere).
State of California status: Endangered.
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Observation Search
~97 records in California
yellowone or more occurrences
within a 7.5-minute quadrangle
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Bloom Period
Genus: Arctostaphylos
Family: Ericaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Communities: Chaparral
Name Status:
Accepted by JEF + CNPS + PLANTS

Information about  Arctostaphylos densiflora from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora

USDA PLANTS Profile (ARDE2)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

[Wikipedia] Rarity, Pathogenic Risk, Description: Arctostaphylos densiflora, known by the common name Vine Hill manzanita, is a very rare species of manzanita. It is endemic to Sonoma County, California, where it is known from only one extant population of 20 to 30 individual plants. These last wild members of the species are on land near Sebastopol which is owned and protected by the California Native Plant Society. In addition, there are five to ten plants of this manzanita taxon growing on private property about a mile away.[2] The local habitat is mostly chaparral on sandy shale soils. Pathogenic Risk The entire wild population is infected with the root pathogen Phytopthera cinnamomi and subject to mortality, which could result in species extinction.[3] Ecological Relationships The flowers of this species provide nectar for butterflies and native bees in the spring, berries provide food for birds in the late summer, and the low-growing habit of the plant make it a good home for California valley quail and wrentit nests. (Lowe 1999)[5] Habitat Species differentiation A. densiflora likely appeared about 1.5 million years ago, although the Arctostaphylos genus itself arose in the Miocene era.[7] (contributed by Mary Ann Machi)


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/28/2024).