Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Global Range: California endemic, Santa Cruz Mountains, Santa Clara, Santa Cruz, and San Mateo Counties.

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Physical Description

Type Information

Isotype for Arctostaphylos andersonii A. Gray
Catalog Number: US 62464
Collection: Smithsonian Institution, National Museum of Natural History, Department of Botany
Verification Degree: Original publication and alleged type specimen examined
Preparation: Pressed specimen
Collector(s): C. L. Anderson
Year Collected: 1873
Locality: Hills of Santa Cruz., Santa Cruz, California, United States, North America
  • Isotype: Gray, A. 1876. Proc. Amer. Acad. Arts. 11: 83.
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Ecology

Habitat

Comments: Broadleafed upland forest, chaparral, North Coast coniferous forest; openings, edges.

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Population Biology

Number of Occurrences

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 6 - 20

Comments: Fewer than fifteen occurrences.

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Conservation

Conservation Status

National NatureServe Conservation Status

United States

Rounded National Status Rank: N2 - Imperiled

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NatureServe Conservation Status

Rounded Global Status Rank: G2 - Imperiled

Reasons: Endemic to California, Arctostaphylos andersonii occurs in a narrow range of Santa Clara, Santa Cruz and San Mateo Counties. It is known from fewer than 15 extant occurrences. Development is a threat to this species.

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Threats

Comments: This species is threatened by development (CNPS 2003).

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Wikipedia

Arctostaphylos andersonii

Arctostaphylos andersonii, the Santa Cruz Manzanita, is a species of Arctostaphylos, limited in geography to the Santa Cruz Mountains of California. It grows in openings in redwood forest below 700 m.

Description[edit]

Arctostaphylos andersonii is a woody shrub 2-5 m high, which can resemble a small tree. The 4-7 cm smooth leaf blades have serrated edges and deeply lobed bases. It flowers February through May. The fruit is small (2-8 mm) and sticky.

The Santa Cruz Manzanita has no basal burl for regrowth and must propagate by seed.

Some populations closer to the Bonny Doon region are highly glaucous (the leaves produce a white, powdery substance on the surface) whereas others are not.

This species is often confused with A. regismontana, A. pallida, and A. pajaroensis, but can be easily identified by geography.

References[edit]

  • W. L. Jepson. 1951. A Manual of the Flowering Plants of California, p. 750.
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