Photographer: Steve C. Garske
Cirsium palustre (L.) Scop.
European swamp thistle, marsh thistle
Cirsium: derived from the Greek kirsion, "a kind of thistle;" also cirsos meaning "a swollen vein" for which thistle was once a remedy
palustre: "of marshes"
Prohibited/Restricted Invasive - Eradicate!
|Status: ||Introduced - naturalized; ecologically invasive|
|Plant: ||erect, biennial, 1' - 6 1/2' tall forb; stems spiny-winged|
|Flower: ||head 3/4" wide with purple disk flowers, bracts (phyllaries) tips not spiny; inflorescence of usually many clustered heads; blooms June-July|
|Fruit:||dry seed on fluffy, feathery-divided pappus usually less than 1/3" long|
|Habitat: ||we to moist; woods, roadsides|