/home/ctbotsoc/ct-botanical-society.org/app/webroot/
Connecticut Plants
Swamp Thistle
Cirsium muticum Michx.
  • Family: aster (Asteraceae)
  • Habitat: wet meadows, moist woods and thickets
  • Height: 3-6 feet
  • Flower size: flowerheads 1-1/2 to 2-1/2 inches across
  • Flower color: pink to magenta
  • Flowering time: July to September
  • Origin: native
Cirsium muticum Michx.
Cirsium muticum Michx.

On swamp thistle, the involucre (the vase-shaped structure beneath the flowers) has cobwebby white hairs, and it is often slightly sticky.