Appearance
''Cirsium altissimum'' is, as the name implies, a tall herb, sometimes reaching as much as 400 cm. It is a biennial or perennial, blooming only once before dying. Leaves are toothed or shallowly lobed, with fine spines along the edge. Sometimes there is only one flower head but more often more, with pink or purple disc florets but no ray florets.
Habitat
The species grows in prairies, open woodlands, and disturbed sites.References:
Some text fragments are auto parsed from Wikipedia.
