Ostrich Fern (Fiddleheads)
Matteuccia struthiopteris

Illustration: Ostrich fern (Matteuccia struthiopteris) fiddleheads
Identification: Fiddleheads emerge in a tight crown cluster; each stem has a deep U-shaped groove on the inside and is wrapped in brown papery scales. Mature fronds are tall, vase-shaped, ostrich-plume-like.
Dangerous look-alikes: Bracken fern (Pteridium) — no U-groove, no papery scales, single fronds not crown clusters; bracken is carcinogenic raw and not recommended. Cinnamon fern has fuzzy white hairs, not papery scales.
Edible parts: Young fiddleheads, 2–6 inches tall, still tightly coiled.
Season and habitat: Spring, 2–3 week window. Rich moist woods, riverbanks, floodplains.
Preparation: Clean off the papery scales, rinse well, and BOIL or STEAM 10–15 minutes. Never eat raw — raw fiddleheads cause food-poisoning-like illness. Sauté in butter after boiling.
Notes: The ostrich fern's fertile fronds (tall brown 'ostrich feathers' persisting through winter) mark colonies year-round. See the High-Risk Index comparison plate.