Taxon Report

Clarkia mildrediae (Heller) Lewis & Lewis ssp. mildrediae

Mildred's clarkia

Print Report


  Classification
Scientific Name:
 Clarkia mildrediae (Heller) Lewis & Lewis ssp. mildrediae
Common Name:
 Mildred's clarkia
Family: Onagraceae
Element Code: PDONA050Q2
USDA Plants Symbol: CLMIM
Synonyms/Other Names:
  • Clarkia mildrediae (Heller) Lewis & Lewis

Ecology and Life History
Lifeform: annual herb
Blooming Period: May-Aug May-Aug
Elevation: 245-1710 (805-5610)
General Habitats: Cismontane woodland, Lower montane coniferous forest
Microhabitat: Granitic (usually), Sandy
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.3
Global Rank: G3T3?
State Rank:
 S3?
State List: None
Fed List: None
Other Status: BLM_S; SB_UCSC; USFS_S
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 77
Element Occurrence Ranks:
   Excellent (A) 8
   Good (B) 33
   Fair (C) 8
   Poor (D) 0
   None (X) 0
   Unknown (U) 28

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Butte (BUT), Plumas (PLU)
Quads: Name (Quad Code)
Belden (4012113), Berry Creek (3912164), Brush Creek (3912163), Bucks Lake (3912182), Caribou (4012112), Cascade (3912162), Cohasset (3912186), Haskins Valley (3912172), Kimshew Point (3912184), Paradise East (3912175), Pulga (3912174), Soapstone Hill (3912173), Stirling City (3912185), Storrie (3912183)

Threat List Data from the CNDDB

Threat List Total: 12
EOs with Threat Listed: Total EOs % of EOs
54 70 %
Road/trail construction/maint. 38 49%
Logging 25 32%
Erosion/runoff 10 12%
Foot traffic/trampling 7 9%
Other 7 9%
Non-native plant impacts 3 3%
ORV activity 3 3%
Grazing 3 3%
Biocides 3 3%
Improper burning regime 1 1%
Insufficient population/stand size 1 1%
Recreational use (non-ORV) 1 1%

Notes
Potentially threatened by road maintenance. See Madrono 12: 34 (1953) for revised nomenclature.
Threats:
Taxonomy:

Selected References

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].