Overview

Distribution

Global Range: The calculated EOO is 170 sq km.

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National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Ecology

Population Biology

Number of Occurrences

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

Estimated Number of Occurrences: 6 - 20

Comments: There are 27 mapped occurrences (CNDDB 2013), but six of them are degraded and some of those may be extirpated. In addition, many of the sites have not been re-checked since the 1980's so this author doubts there are 27 occurrences anymore.

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Conservation

Conservation Status

NatureServe Conservation Status

Rounded Global Status Rank: T2 - Imperiled

Reasons: This succulent rosette plant is known from about 20-25 occurrences, many of which have not been seen in many years. At least six are in a degraded condition. The threats are quite high since this taxon occurs in a highly devleoping area near San Luis Obispo.

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National NatureServe Conservation Status

United States

Rounded National Status Rank: N2 - Imperiled

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Global Short Term Trend: Decline of 10-30%

Comments: There are six occurrences ranked C or D and that makes up more than 25% of the total occurrences known.

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Threats

Comments: Threats are high, and include grazing, development, erosion, roads, non-native plants, pig damage, and military operations.

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