Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Global Range: Endemic to the Middle Fork of the Tule River drainage (Tulare County) in Giant Sequoia National Monument (Linton 2012).

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Ecology

Habitat

Comments: Rock outcrops within in Canyon Live Oak woodland & chaparral on metamorphic carbonate substrate (Limestone & Marble).

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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: 1 - 5

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Life History and Behavior

Life Cycle

Persistence: PERENNIAL

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Conservation

Conservation Status

NatureServe Conservation Status

Rounded Global Status Rank: T2 - Imperiled

Reasons: Known from only a couple sites in Tulare County, California. Anthropogenic threats are minimal because the sites are relatively inaccessible, but illegal harvest is a potential risk. The inaccessibility of sites also limits the extent of survey for potential habitat.

Environmental Specificity: Narrow. Specialist or community with key requirements common.

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National NatureServe Conservation Status

United States

Rounded National Status Rank: N2 - Imperiled

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Global Short Term Trend: Relatively stable (=10% change)

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Threats

Degree of Threat: Low

Comments: Sites are relatively inaccessible and therefore protected from threats such as illegal collection.

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Names and Taxonomy

Taxonomy

Comments: Editorial comments entered in the Jepson Interchange (online as of September 2011) conclude, after consultation with Kanchi Ghandi, Nancy Morin, Dan Nicolson, International Plant Names Index colleagues, among others regarding the correct Latin for the epithet of this subspecies, that 'costatifolia' is the most appropriate (those proposed and sometimes published were costafolia, costifolia, costaefolia, costiformifolia, and costatifolia).

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