Taxon Report

Phacelia saxicola A. Gray

stonecrop phacelia

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© 2019 Aaron Schusteff

Taxon Summary

Phacelia saxicola, commonly known as stonecrop phacelia, is a annual herb in the Hydrophyllaceae that is found in California and elsewhere. It occurs within Great Basin scrub, growing at elevations from 1270 to 1890 meters. Phacelia saxicola is ranked 2B.3, Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere; Not very threatened in California.

  Classification
Scientific Name:
 Phacelia saxicola A. Gray
Common Name:
 stonecrop phacelia
Family: Hydrophyllaceae
Element Code: PDHYD0C480
USDA Plants Symbol: PHSA
Synonyms/Other Names:

Ecology and Life History
Lifeform: annual herb
Blooming Period: Apr-Jun(Jul) Apr-Jun(Jul)
Elevation: 1270-1890 (4165-6200)
General Habitats: Great Basin scrub
Microhabitat: Gravelly, Rocky, Volcanic
Microhabitat Details: Occurs on limestone in other states; expected on limestone in California.

Conservation Status
CA Rare Plant Rank: 2B.3
Global Rank: G3?
State Rank:
 S2
State List: None
Fed List: None
Other Status:
CRPR Changes:
  • added to 2B.3 on 2024-03-07

Occurrence Data from the CNDDB
Total Occurrences: 22
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 0
   Fair (C) 0
   Poor (D) 0
   None (X) 0
   Unknown (U) 22

Location
California Endemic:  False
California Counties and Islands: Name (Code)
Inyo (INY), Mono (MNO)
Quads: Name (Quad Code)
Casa Diablo Mtn. (3711855), Chidago Canyon (3711854), Fish Slough (3711844), Rovana (3711845), Toms Place (3711856)

Threat List Data from the CNDDB

Threat List Total: 1
EOs with Threat Listed: Total EOs % of EOs
1 5 %
Other 1 4%

Notes
Threats:
Possibly threatened by grazing, non-native plants, and recreational activities
Taxonomy:

Selected References

Proposed addition to CRPR 2B.3, G3/ S2 (2024)
Proceedings of the American Academy of Arts and Sciences Vol. (20): 304. (1885)
Citation California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 22 February 2025].