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Tennessee Fragile Fern

Also known as: Tennessee bladder fern

Cystopteris tennesseensis Shaver

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Tennessee Fragile Fern
Tennessee Fragile Fern sori
Tennessee Fragile Fern
Tennessee Fragile Fern
Tennessee Fragile Fern
Tennessee Fragile Fern pinnules and sori
Tennessee Fragile Fern
Tennessee Fragile Fern
Tennessee Fragile Fern
Tennessee Fragile Fern pinnules and sori

Morphology

Culm
Creeping, to 6 inches long, old petiole bases congested; scales tan to pale brown, linear-lanceolate, .08 to .12 inch, glabrous.
Leaves
Petiole usually with dark brown base, golden-brown distally, 1.2 to 10 inches long, shorter than blade; blade triangular, 3 to 18 inches long, 1 to 5.5 inches wide, (widest at base), bi-pinnatifid, apex acuminate; pinnae short petiolate, generally perpendicular to rachis, mostly opposite, deltoid to lanceolate, .6 to 3 inches long, .2 to 1.4 inches wide, margins serrate, apex acute to acuminate; pinnules obtusely lobed and toothed, veins running to the teeth and sinuses, pinnules near apex with parallel sides and strongly ascending; indusium cup-shaped, somewhat glandular; sori discrete, round, spiny.

Ecology

Habitat
Moist woodlands, shaded limestone or sandstone crevices or ledges.
Distribution
East 1/2 of Kansas

Practical Information

Uses
The Cherokee took a compound infusion for chills and the Navajo applied a cold, compound infusion on injuries.

Additional Notes

Comments

The leaves die back in winter. Cystopteris, Greek "Kystos", bladder, and "pteris", fern, alluding to the inflated indusium when young.

Quick Facts
Plant Type
Sedge
Family
Dryopteridaceae - Wood Fern Family
Life Span
Perennial
Height
To 12 inches
Origin
Native
Last Updated
2019-02-26
Flowering Period
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Blooms: May, June, July, August, September