Species Details

Clarkia borealis ssp. borealis

northern clarkia

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Photo of Clarkia borealis ssp. borealis
©2018 Sierra Pacific Industries
Photo of Clarkia borealis ssp. borealis
©2002 Martin J. Lenz
Photo of Clarkia borealis ssp. borealis
©2016 Sierra Pacific Industries
Scientific Name:
Clarkia borealis E. Small ssp. borealis
Common Name:
northern clarkia
Family: Onagraceae
Element Code: PDONA05062
USDA Plants Symbol: CLBOB
Synonyms/Other Names:
CA Rare Plant Rank: 4.3
Fed List: None
State List: None
Global Rank: G4T4
State Rank:
Other Status: BLM_S; SB_UCSC; USFS_S
CRPR Changes:
changed from 1B.3 to 4.3 on 2020-03-16
Add Date: 1980-01-01
Date Edited: 2022-08-02
Lifeform: annual
Blooming Period: Jun-Sep
400 - 1565 meters
1310 - 5135 feet
General Habitat:
  • Chaparral
  • Cismontane woodland
  • Lower montane coniferous forest
General Micro Habitat: often roadcuts
Micro Habitat:
  • Roadsides (often)

Possibly threatened by non-native plants. Potentially threatened by timber harvest activities. 


Distinctiveness from ssp. arida needs study. 


More common than originally thought when first ranked.

Total Occurrences: 131
Element Occurrence Ranks:
16 75 16 0 0 24
Occurrence Status:
Historical >20 Years 14
Recent <=20 Years 117
Presumed Extant 131
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Shasta (SHA), Trinity (TRI)
Quads: Name (Quad Code)
Big Bend (4112118), Bohemotash Mtn. (4012274), Bollibokka Mtn. (4012282), Chalk Mtn. (4012187), Chicken Hawk Hill (4112214), Damnation Peak (4012285), Devils Rock (4012271), Goose Gap (4012281), Hanland Peak (4012283), Lamoine (4012284), Miller Mtn. (4012167), Minnesota Mtn. (4012272), Montgomery Creek (4012178), O'Brien (4012273), Papoose Creek (4012276), Project City (4012263), Roaring Creek (4012188), Schell Mtn. (4012275), Shasta Dam (4012264), Shoeinhorse Mtn. (4112211), Skunk Ridge (4112117), Tombstone Mtn. (4112213), Trinity Center (4012286), Whitmore (4012168), Yellowjacket Mtn. (4112212)
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.


Presumed Extant
Counties   Quads