Taxon Report

Blennosperma bakeri Heiser

Sonoma sunshine

Print Report


  Classification
Scientific Name:
 Blennosperma bakeri Heiser
Common Name:
 Sonoma sunshine
Family: Asteraceae
Element Code: PDAST1A010
USDA Plants Symbol: BLBA
Synonyms/Other Names:

Ecology and Life History
Lifeform: annual herb
Blooming Period: Mar-May Mar-May
Elevation: 10-110 (35-360)
General Habitats: Valley and foothill grassland, Vernal pools
Microhabitat:
Microhabitat Details:

Conservation Status
CA Rare Plant Rank: 1B.1
Global Rank: G1
State Rank:
 S1
State List: CE
Fed List: FE
Other Status: SB_CalBG/RSABG
CRPR Changes:

Occurrence Data from the CNDDB
Total Occurrences: 24
Element Occurrence Ranks:
   Excellent (A) 0
   Good (B) 9
   Fair (C) 6
   Poor (D) 1
   None (X) 5
   Unknown (U) 3

Location
California Endemic:  True
California Counties and Islands: Name (Code)
Mendocino (MEN), Sonoma (SON)
Quads: Name (Quad Code)
Cotati (3812236), Glen Ellen (3812235), Healdsburg (3812257), Laughlin Range (3912333), Santa Rosa (3812246), Sears Point (3812224), Sebastopol (3812247), Sonoma (3812234), Two Rock (3812237)

Threat List Data from the CNDDB

Threat List Total: 15
EOs with Threat Listed: Total EOs % of EOs
20 83 %
Non-native plant impacts 11 45%
Agriculture 10 41%
Development 10 41%
Grazing 10 41%
Disking 7 29%
ORV activity 4 16%
Other 4 16%
Vandalism/dumping/litter 4 16%
Road/trail construction/maint. 3 12%
Altered flood/tidal/hydrologic regime 3 12%
Recreational use (non-ORV) 2 8%
Biocides 1 4%
Erosion/runoff 1 4%
Wood cutting or brush clearing 1 4%
Improper burning regime 1 4%

Notes
Threatened by residential development, urbanization, grazing, and agriculture. Possibly threatened by non-native plants, foot traffic and road maintenance. See Madroño 9(3):103-104 (1947) 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 January 2025].