Species Details

Brodiaea santarosae

Santa Rosa Basalt brodiaea

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Photo by © 2021 W. Juergen Schrenk  max-height:128px; max-width:145px;
© 2021 W. Juergen Schrenk
Photo by © 2018 Ron Vanderhoff  max-height:128px; max-width:145px;
© 2018 Ron Vanderhoff
Photo by © 2018 Ron Vanderhoff  max-height:128px; max-width:145px;
© 2018 Ron Vanderhoff
Scientific Name:
Brodiaea santarosae T. Chester, W. Armstrong & K. Madore
Common Name:
Santa Rosa Basalt brodiaea
Family: Themidaceae
Element Code: PMLIL0C0G0
USDA Plants Symbol: BRSA
Synonyms/Other Names:
CA Rare Plant Rank: 1B.2
Fed List: None
State List: None
Global Rank: G1
State Rank:
Other Status: USFS_S
CRPR Changes:
changed from 3 to 1B.2 on 2013-09-17
added to 3 on 2008-02-14
Add Date: 2008-02-05
Date Edited: 2021-06-03
Lifeform: perennial bulbiferous herb
Blooming Period: May-Jun
565 - 1045 meters
1855 - 3430 feet
General Habitat:
  • Valley and foothill grassland
General Micro Habitat: basaltic
Micro Habitat:
Previously CRPR 3; plants were known as possible hybrids between B. filifolia and B. orcuttii, but are now recognized as distinct. Research into the evolutionary origin of B. santarosae is currently underway. Possibly threatened by development. Forms sterile hybrids with B. terrestris ssp. kernensis. Not in TJM (1993). See MadroƱo 54(2):187-198 (2007) for original description.
Total Occurrences: 12
Element Occurrence Ranks:
2 1 1 0 0 8
Occurrence Status:
Historical >20 Years 6
Recent <=20 Years 6
Presumed Extant 12
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Riverside (RIV), San Diego (SDG)
Quads: Name (Quad Code)
Fallbrook (3311743), Margarita Peak (3311744), Murrieta (3311752), Sitton Peak (3311754), Wildomar (3311753)
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