Taxon Report

Dudleya blochmaniae (Eastw.) Moran ssp. blochmaniae

Blochman's dudleya

Print Report


© 2011 Aaron E. Sims

  Classification
Scientific Name:
 Dudleya blochmaniae (Eastw.) Moran ssp. blochmaniae
Common Name:
 Blochman's dudleya
Family: Crassulaceae
Element Code: PDCRA04051
USDA Plants Symbol: DUBLB
Synonyms/Other Names:

Ecology and Life History
Lifeform: perennial herb
Blooming Period: Apr-Jun Apr-Jun
Elevation: 5-450 (15-1475)
General Habitats: Chaparral, Coastal bluff scrub, Coastal scrub, Valley and foothill grassland
Microhabitat: Clay (often), Rocky, Serpentine
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.1
Global Rank: G3T2
State Rank:
 S2
State List: None
Fed List: None
Other Status: BLM_S; SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 81
Element Occurrence Ranks:
   Excellent (A) 5
   Good (B) 15
   Fair (C) 5
   Poor (D) 1
   None (X) 5
   Unknown (U) 50

Location
California Endemic:  False
California Counties and Islands: Name (Code)
Los Angeles (LAX), Orange (ORA), San Diego (SDG), San Luis Obispo (SLO), Santa Barbara (SBA), Ventura (VEN)
Quads: Name (Quad Code)
Calabasas (3411826), Camarillo (3411921), Cambria (3512151), Canoga Park (3411825), Casmalia (3412075), Cayucos (3512048), Dana Point (3311746), Guadalupe (3412085), Imperial Beach (3211751), La Jolla (3211772), Las Pulgas Canyon (3311734), Malibu Beach (3411816), Morro Bay North (3512047), Morro Bay South (3512037), Newbury Park (3411828), Oceanside (3311724), Pismo Beach (3512026), Point Dume (3411817), Point Sal (3412086), San Clemente (3311745), San Luis Obispo (3512036), San Luis Rey (3311723), San Simeon (3512162), Surf (3412065), Triunfo Pass (3411818)

Threat List Data from the CNDDB

Threat List Total: 15
EOs with Threat Listed: Total EOs % of EOs
41 51 %
Development 17 20%
Grazing 14 17%
Non-native plant impacts 14 17%
Foot traffic/trampling 8 9%
Military operations 7 8%
Improper burning regime 6 7%
Feral pigs 6 7%
Road/trail construction/maint. 5 6%
ORV activity 5 6%
Erosion/runoff 3 3%
Vandalism/dumping/litter 2 2%
Other 1 1%
Recreational use (non-ORV) 1 1%
Altered flood/tidal/hydrologic regime 1 1%
Mining 1 1%

Notes
Threatened by grazing, trampling, development, erosion, and non-native plants. Northern and southern populations genetically distinct.
Threats:
Taxonomy:

Selected References

Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 1 January 2025].