Key to Wisconsin Dennstaedtiaceae
Author: Robert W. Freckmann
- 1a.Blades lanceolate, about 3 times longer than wide; sori distinct, covered by an indusium Dennstaedita
- 1b.Blades broadly triangular, approximately as wide as long; sori forming a continuous band along pinnules of fertile fronds, partly covered by the reflexed margin Pteridium
A worldwide family of about 20 genera and over 300 species of mostly large ferns forming large colonies by long-creeping rhizomes.