Northern Prairie Wildlife Research Center
Marsh Fern (Thelypteris thelypteroides)
- Family: Fern (Polypodiaceae)
- Fruiting: June-October
- Field Marks: This is a deciduous fern that grows in marshy soils. The leaves are divided 1 1/2 times
- Habitat: Marshes, wet woods.
- Habit: Perennial herb with slender, creeping, black rhizomes.
- Stems: No aerial stems present.
- Leaves: Deciduous, lanceolate, covered with short hairs, at least when young, divided 1 1/2 times into tiny, more or less toothless segments with forking veins.
- Reproductive Bodies: Circular, along the edges of the leaf segments.
- Notes: Marsh fern is usually known as Thelypteris palustris.
Previous Species -- Royal Fern (Osmunda regalis)
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