Onocleaceae

1. Sterile blades solitary from a creeping rhizomes, deeply divided into undulate lobes (or the lowermost divisions actually undulate-margined pinnae).

Onoclea

1. Sterile blades radiating in a circle from a thick crown; pinnate with lobed pinnules.

Matteuccia

Citation:

MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. March 29, 2017. http://michiganflora.net/family.aspx?id=Onocleaceae.