Key to the Ferns of Wisconsin

Gary Fewless

Key to the Ferns

45. Some pinnules (usually not those on pinnae near the base or tip of each frond) have a basal auricle at their base pointing toward the tip of the frond; indusium attached at its center (peltate) and radially symmetrical, without a sinus on one side; leaves evergreen.	*45.5*
45. No pinnules with basal auricles; indusium attached at a sinus on one side, therefore not radially symmetrical, sometimes described as kidney-shaped; leaves evergreen or not.	46