Photographer: Merel R. Black
Cirsium altissimum (L.) Spreng.
tall thistle, wood thistle
Cirsium: derived from the Greek kirsion, "a kind of thistle;" also cirsos meaning "a swollen vein" for which thistle was once a remedy
altissimum: Latin for "especially tall"
|Plant: ||erect, (biennial?)/perennial, 3'-10' tall, widely branched, spiny forb|
|Flower: ||head up to 1 1/4 wide with pink to purple disk flowers; inflorescence of one to many heads on a somewhat leafy stalk; blooms July-Oct.|
|Fruit:||dry seed on fluffy, feathery-divided pappus|
|Leaf:||large, with spiny teeth or shallow lobes but not divided, underside with dense, whitish fuzz|
|Habitat: ||dry to moderate moisture; fields, disturbed sites, open woods|
|Notes: ||similar to C. discolor|