Key to Wisconsin Dryopteridaceae

Author: Robert W. Freckmann

• 1a.Pinnae and pinnules lacking a single enlarged lobe at the base; leaves deciduous, or evergreen, not exceptionally dark green, glossy, or leathery; indusium reniform, attached at a narrow sinus Dryopteris

• 1b.Pinnae or pinnules (if twice pinnate) each with an enlarged lobe on the upper side at the base, pointing upward; leaves glossy dark green, leathery, and evergreen or nearly evergreen; indusium round, peltate Polystichum