From the central coast of California to southern San Diego, and into northern Baja California, Mexico [1, 2, 3].
Known Populations in San Diego County
Three occurrences on Conserved Lands in MUs 3 (Border Field State Park) and 6 (Carlsbad Oaks North Habitat Conservation Area).
List status
None [3].
Habitat affinities
Rocky, often clay or serpentine soils [3]. Primary habitat associations are coastal bluff scrub, chaparral, coastal scrub, and valley and foothill grassland. Elevation range is 5-450 meters.
Taxonomy and genetics
Crassulaceae family [3]. Northern and southern populations are genetically distinct.
Life history demography
Herbaceous perennial [3].
Seasonal phenology
Bloom period is April-June [2].
Threats
Threatened by grazing, trampling, development, erosion, and non-native plants [3].
Special considerations:
Hybrids with Dudleya edulis suspected [2].
Blochman's dudleya sources
[1] McCabe, S. W. 2016. Dudleya blochmaniae subsp. Blochmaniae, in Jepson Flor Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgibin/get_IJM.pl?tid=50229, accessed on August 31, 2016.