Coefficient of Conservatism:
Coefficient of Wetness:
B. S. Walters
This species does not range as far west into the prairies as the others, but is the most common in southern Michigan, especially in calcareous places; prairies and similar grassy habitats (even conspicuous along roadsides), fens, railroad embankments.
The very large, vertical leaves (blade up to 3 dm broad on long petioles) make this a plant recognizable from a distance even without the tall (at least to 3.5 m) stem with large heads. The large woody taproot is likewise impressive.
A Menominee Co. collection (D. Henson 1573) found in a mixed colony of this species and S. laciniatum has leaves and phyllaries intermediate, and is presumably a hybrid.