Species PlantsCinnamon Fern

Cinnamon Fern

Osmundastrum cinnamomeum

CommonPlant
Illustration of Cinnamon Fern (Osmundastrum cinnamomeum)

Cinnamon Fern is a large, vase-shaped native fern growing 3–5 feet tall in moist forests and wetlands across eastern North America. It is named for the distinctive, cinnamon-colored fertile fronds that emerge in early spring among the larger sterile green fronds. The woolly cinnamon-colored hairs at the base of the fronds are a key identification feature. Cinnamon Fern provides nesting material for many birds and its uncoiling fiddleheads are edible and were eaten by Indigenous peoples.

Habitat
Found in moist to wet forests, swamps, and stream banks across eastern and central North America.
Diet
Woolly frond bases used as nesting material by birds; provides shelter for salamanders and invertebrates.
How common
Common

Best time to see a Cinnamon Fern

The best time to see a Cinnamon Fern is April–June, when about 65% of U.S. sightings happen, based on 34,447 research-grade iNaturalist observations.

J
F
M
A
M
J
J
A
S
O
N
D

Not certain it is a Cinnamon Fern? What plant is this? walks through what to check first and the lookalikes that catch people out.

Recent Cinnamon Fern sightings near you

Live, research-grade observations from iNaturalist. Allow location to center the map on you.

Spot a Cinnamon Fern? Identify it instantly.

Point Huck at any plant, bird, or animal for an instant ID, its rarity, and a live map of where it is being seen near you.

Get Huck

Get an alert when a Cinnamon Fern is spotted

Pick a park, state, or city and we’ll email you when one turns up there. One check a day, only when there’s something new.

Free. Unsubscribe from any email. See our Privacy Policy.

Love plants? Get Huck field notes

Spotting tips, new species, and the best of what people are finding in the wild - straight to your inbox.

By subscribing you agree to receive Huck emails. No spam, unsubscribe anytime. See our Privacy Policy.

More plants

Clammy Ground Cherry
Clammy Ground Cherry
Physalis heterophylla
Clammy Hedgehyssop
Clammy Hedgehyssop
Gratiola neglecta
Clammy Locust
Clammy Locust
Robinia viscosa
Claret Cup Cactus
Claret Cup Cactus
Echinocereus triglochidiatus
Clasping Milkweed
Clasping Milkweed
Asclepias amplexicaulis
Clasping Twisted Stalk
Clasping Twisted Stalk
Streptopus amplexifolius
Cleavers
Cleavers
Galium aparine
Climbing Hempweed
Climbing Hempweed
Mikania scandens