Connecticut Plants
Yellow Thistle
Cirsium horridulum Michx.

Yellow thistle is endangered in Connecticut. Typically, the flowers are dull yellow, though flower color varies. The upright, spiny bracts that surround the flowerhead make a good identifier.

  • Family: aster (Asteraceae)
  • Habitat: near the coast in sandy fields or at the edge of salt marshes
  • Height: 1-3 feet
  • Flower size: flowerheads 3 inches across
  • Flower color: dull yellow, or, rarely, purple or white
  • Flowering time: June to July
  • Origin: native
Cirsium horridulum Michx.
Cirsium horridulum Michx.
Cirsium horridulum Michx.

Basal leaves of yellow thistle.