Taxon Report

Clarkia springvillensis Vasek

Springville clarkia

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Taxon Summary

Clarkia springvillensis, commonly known as Springville clarkia, is a annual herb in the Onagraceae that is found only in California. It occurs within Chaparral, Cismontane woodland, and Valley and foothill grassland, growing at elevations from 245 to 1220 meters. Clarkia springvillensis is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.

  Classification
Scientific Name:
 Clarkia springvillensis Vasek
Common Name:
 Springville clarkia
Family: Onagraceae
Element Code: PDONA05120
USDA Plants Symbol: CLSP6
Synonyms/Other Names:

Ecology and Life History
Lifeform: annual herb
Blooming Period: (Mar)Apr-Jul (Mar)Apr-Jul
Elevation: 245-1220 (805-4005)
General Habitats: Chaparral, Cismontane woodland, Valley and foothill grassland
Microhabitat: Granitic
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.2
Global Rank: G2
State Rank:
 S2
State List: CE
Fed List: FT
Other Status: SB_UCSC
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 28
Element Occurrence Ranks:
   Excellent (A) 1
   Good (B) 10
   Fair (C) 6
   Poor (D) 0
   None (X) 1
   Unknown (U) 10

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Tulare (TUL)
Quads: Name (Quad Code)
California Hot Springs (3511886), Camp Wishon (3611826), Case Mountain (3611847), Dennison Peak (3611837), Globe (3611817), Porterville (3611911), Sentinel Peak (3611815), Solo Peak (3611816), Springville (3611827), Success Dam (3611818)

Threat List Data from the CNDDB

Threat List Total: 12
EOs with Threat Listed: Total EOs % of EOs
20 71 %
Grazing 9 32%
Road/trail construction/maint. 9 32%
Development 6 21%
Other 6 21%
Foot traffic/trampling 4 14%
Biocides 4 14%
Non-native plant impacts 3 10%
ORV activity 1 3%
Recreational use (non-ORV) 1 3%
Logging 1 3%
Surface water diversion 1 3%
Wood cutting or brush clearing 1 3%

Notes
Threatened by non-native plants, overgrazing, vehicles, road maintenance, logging, and residential development. Sequoia NF has adopted species management guidelines. See Madroño 17(7):220 (1964) for original description.
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 6 November 2025].