Sub-category: Aster family
A biennial or perennial herb up to 200 cm tall, producing a large taproot. There is usually only one stem with numerous spiny leaves that are green on the upper side but white and woolly underneath. The plant has pink or lavender flower heads. Heads have many disc florets but no ray florets.
The species grows primarily in damp areas in forest openings, prairies, and disturbed sites. Blooms in late summer/early fall.