Pteridium aquilinum. - Bracken ferns - Bracken ferns are the only ferns adapted to grow in locations with full sun. Thus, you can find them in open fields.
This fern is poisonous. Do not mistake it for the edible fiddlehead or Ostrich Fern. Primary Poisons: prunasin, ptaquiloside, thiaminase
Adamant, VT, 5/18/2007.