Regularity: Regularly occurring
Localities documented in Tropicos sources
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.
- Hartman, R. L. & B. E. Nelson. 1998. Novelties from North America north of Mexico: A 20-Year Vascular plant Diversity Baseline. 1–51 (mss.). http://www.tropicos.org/Reference/11044
- Nakai, K. M. 1987. Some new and reconsidered California Dudleya (Crassulaceae). Madroño 34: 334–353. http://www.tropicos.org/Reference/9342
Global Range: California endemic, San Bernardino Mountains in San Bernardino County.
Comments: Pebble (Pavement) plain, pinyon and juniper woodland, upper montane coniferous forest; granitic, quartzite, or carbonate.
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).
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.
National NatureServe Conservation Status
Rounded National Status Rank: N2 - Imperiled
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.