Taxon Report

Euphorbia jaegeri V.W. Steinmann & J. AndreĀ“

Orocopia Mountains spurge

Print Report



  Classification

Scientific Name:
Euphorbia jaegeri V.W. Steinmann & J. AndreĀ“
Common Name:
Orocopia Mountains spurge
Family: Euphorbiaceae
Element Code: PDEUP0Q440
USDA Plants Symbol:
Synonyms/Other Names:

Ecology and Life History

Lifeform: perennial shrub
Blooming Period: Oct-May Oct-May
Elevation: 600-850 (1970-2790)
General Habitats: Mojavean desert scrub
Microhabitat: Carbonate, Granitic, Gravelly (sometimes), Metamorphic, Rocky
Microhabitat Details: Rocky hillsides and arroyos, gravelly or rocky crevices

Conservation Status

CA Rare Plant Rank: 1B.1
Global Rank: G1
State Rank:
S1
State List: None
Fed List: None
Other Status: BLM_S; SB_CalBG/RSABG
CRPR Changes:
  • added to 1B.1 on 2013-01-17

Occurrence Data from the CNDDB

Total Occurrences: 4
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 1
   Fair (C) 3
   Poor (D) 0
   None (X) 0
   Unknown (U) 0
California Endemic:  True
California Counties and Islands: Name (Code)
Riverside (RIV), San Bernardino (SBD)
Quads: Name (Quad Code)
Amboy (3411556), Cadiz (3411555), East of Siberia (3411567), Hayfield (3311566)

Threat List Data from the CNDDB

Threat List Total: 3
EOs with Threat Listed: Total EOs % of EOs
4 100 %
Development 4 100%
Mining 3 75%
Road/trail construction/maint. 1 25%

Notes

Known only from the Bristol, Marble, and Orocopia Mtns. Potentially occurs in the Coxcomb, Eagle, Iron, and Sheephole Mtns.; needs field surveys. Threatened by road maintenance and mining. Potentially threatened by wind energy development. Similar to E. polycarpa and E. setiloba (see Chamaesyce polycarpa and C. setiloba in TJM 2). Not in TJM 2. See Aliso 30:1-4 (2012) for original description.
Threats:
Taxonomy:

Selected References

CRPR List Addition on 2013-01-17
Citation California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 25 December 2024].