Cirsium douglasii var. douglasii

swamp thistle
Family:Asteraceae

Rarity

CNPS-EB: A1

2 current natural populations

Criteria:
  • S Limit

Ecology

Flowers June - August
Habitats:
  • Freshwater Marsh
  • Serpentine or Serpentine-derived soils

Populations

Key
LocationPop IDLast RecordedNotes
Mt. Diablo State Park - Summit and Upper area - 2500 ft and abo42024-08-13
Mt. Diablo State Park - West side12011-05-22
Mt. Diablo State Park - South side31939-12-31Historic
Mt. Diablo State Park - West side21933-12-31Historic