Gymnocarpium dryopteris (L.) Newman - Oak Fern


 

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Gymnocarpium dropteris - (image 1 of 3)

 

Taxonomy

Family: Dryopteridaceae

Habitat

Rocky woods, swamps. Talus slopes in rich, usually moist, sub-acid soil. Also epipetric on cliffs. Prefers cool, damp and shaded conditions

Associates

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Distribution

Most of the northern tier of the US and part of the southwest.

Morphology

Deciduous, growing from thin, long-creeping black rhizomes. Leaves triangular, in three distinct parts, almost horizontal, lowest pair of leaflets taper abruptly. Stalks fine, smooth, and longer than the leaves. Leaves produced throughout the summer.

Notes

Flowers NA

Wetland indicator: Upland, Facultative upland

Like a small bracken fern. Can be cultivated in rich soil in partial sun. Gymnocarpus differs from the genus Dryopteris in its small, delicate, tripartite laminae with long-stalked basal pinnae.

 


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 Michael Hough 2005