Rydb.
Identity
Unique IDELEMENT_GLOBAL.2.133268
Element CodePDSAX0E010
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderRosales
FamilySaxifragaceae
GenusHeuchera
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Conservation Status
Rank Method Rank calculation - Excel v3.2x
Review Date2024-09-11
Change Date2024-09-11
Edition Date2018-01-09
Edition AuthorsBittman (2018)
Threat ImpactLow
Range Extent1000-5000 square km (about 400-2000 square miles)
Number of Occurrences21 - 80
Rank ReasonsHeuchera abramsii is a perennial herb that is endemic to rocky soils in red fir forests of the San Antonia and San Gabriel Mountain region in Los Angeles and San Bernardino counties of California. There are an estimated 21 to 80 occurrences of this species, though differences between southern California Heuchera are subtle and difficult to distinguish. Most populations occur on protected National Forest lands, where anthropogenic threats are presumed to be low.
Range Extent CommentsHeuchera abramsii is endemic to the San Antonio and San Gabriel Mountain region in Los Angeles and San Bernardino counties of California in the western United States (FNA 2009). Range extent was estimated to be 4,410 square kilometers.
Occurrences CommentsThe number of occurrences was estimated to be 21 to 80.
Threat Impact CommentsHeuchera abramsii is ranked as "not very threatened in California" (CNPS 2024). This ranking means that less than 20% of occurrences are considered threatened, or that there is a low degree and immediacy of threats, or that current threats to the species are unknown. Most populations occur on protected lands in the Angeles, Mt. San Antonio, and San Bernardino National Forests, where anthropogenic threats are presumed to be low (Calflora 2024).