Overview

Distribution

National Distribution

United States

Origin: Native

Regularity: Regularly occurring

Currently: Present

Confidence: Confident

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Localities documented in Tropicos sources

Dudleya abramsii subsp. affinis K.M. Nakai:
United States (North America)

Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
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Global Range: California endemic, San Bernardino Mountains in San Bernardino County.

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Ecology

Habitat

Comments: Pebble (Pavement) plain, pinyon and juniper woodland, upper montane coniferous forest; granitic, quartzite, or carbonate.

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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: 21 - 80

Comments: 51 EOs. However, 43 are ranked as unknown (CNDDB 2012).

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Conservation

Conservation Status

NatureServe Conservation Status

Rounded Global Status Rank: T2 - Imperiled

Reasons: Endemic to California, Dudleya abramsii ssp. affinis is known only from the San Bernardino Mountains in San Bernardino County. Development and limestone mining are threats to this taxon.

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National NatureServe Conservation Status

United States

Rounded National Status Rank: N2 - Imperiled

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Threats

Comments: Development and limestone mining. Some localized threats include exotic species, illegal trash dumping, ORVs, horse tramping (trails in close proximity) and trampling by hikers.

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