Pteridium aquilinium (L.) Kuhn
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Lvs mostly (3–)5–15(–20) dm overall, the erect petiole mostly some-what shorter than the more spreading blade; 2n=104. Many habitats; widespread at least in the N. Hemisphere.