Fiddleheads are the budding, coiled “leaves” of ostrich ferns ferns Matteuccia struthiopteris.    From Wordnik.com.  [Archive 2007-10-01] Reference

Below, a swath of Ostrich ferns, Matteuccia struthiopteris, is unfurling its fiddleheads.    From Wordnik.com.  [Alan Ilagan] Reference

Matteuccia struthiopteris, are considered edible delicacies, their "woodsy" flavor the taste of spring itself.    From Wordnik.com.  [The Washington Post: National, World & D.C. Area News and Headlines - washingtonpost.com] Reference