Grown habit: Forb/herb
Duration: Perennial
Synonyms:
= Dryopteris assimilis S. Walker
= Dryopteris dilatata auct. non (Hoffm.) A. Gray
= Dryopteris dilatata (Hoffm.) A. Gray ssp. americana (Fisch.) Hultén
= Dryopteris spinulosa (O.F. Müll.) Watt var. dilatata auct. non (Hoffm.) Underw.
Dryopteris expansa
USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 1: 21.
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Distribution in USA and Canada (*)
USA (AK, CA, CO, ID, MI, MN, MT, OR, WA, WI, WY), CAN (AB, BC, LB, NF, NT, ON, QC, YT), DEN (GL)
Map for Dryopteris expansa (C. Presl) Fraser-Jenkins & Jermy
(*) USDA, NRCS. 2009. The PLANTS Database (http://plants.usda.gov, 28 August 2009). National Plant Data Center, Baton Rouge, LA 70874-4490 USA
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