Interrupted Fern

Interrupted Fern

Claytosmunda claytoniana
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Conservation Status: LC

The Interrupted Fern is classified as LC under the IUCN Red List of Threatened Species.

Quick Facts & Botanical Stats

Plant Category
Ferns & Lycophytes
Growth Habit
Deciduous Fern
Primary Habitat
Moist temperate forests, swamp edges, and damp ravines.
Average Lifespan
Perennial
Water Requirement
High
Maximum Height
60 - 150 cm
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Native Region
Eastern North America and Eastern Asia

Species Overview

Interrupted Fern gets its name from the gap created in middle of its fronds where spore leaflets grow.

Physical Appearance & Anatomy

Large arching green fronds with dark brown, spore-bearing leaflets in the middle of the blade.

Habitat & Growth Behavior

Forms stately circular crowns in rich, moist woodland soils.

Ecological Role & Symbioses

Provides dense ground shelter for amphibians and woodland songbirds.

Reproduction, Lifecycle & Propagation

Spore-bearing leaflets wither after releasing spores, leaving an 'interrupted' gap.

Conservation Status & Environmental Threats

Common and stable in mature eastern forests.

Interesting Fun Facts

  • Fossil evidence shows this fern species has remained virtually unchanged for over 75 million years.
  • The gap in the middle of the frond looks as if middle leaflets were clipped away.

Related Plants

Boston Fern

Boston Fern

Least Concern
Nephrolepis exaltata

What is a Boston fern? The Boston fern (Nephrolepis exaltata 'Bostoniensis') is a popular species of fern belonging to the Lomariopsidaceae family. Native to humid, tropical woodlands and swamps, it is globally famous for its lush, arching, feathery fronds. Discovered in a shipment of ferns from Boston to Philadelphia in 1894, it became a classic Victorian houseplant. Like all ferns, it is a non-flowering vascular plant that reproduces via spores rather than seeds.

Ostrich Fern

Ostrich Fern

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Matteuccia struthiopteris

What is an ostrich fern? The ostrich fern (Matteuccia struthiopteris) is a large crown-forming deciduous fern belonging to the Onocleaceae family. Native to temperate regions of North America and Eurasia, it is named for its large, upright, feathery green fronds that resemble ostrich feathers. Are ostrich ferns edible? Yes, the tightly coiled young fronds, known as fiddleheads, are harvested in spring and eaten as a seasonal delicacy in North America and Japan.