TENNESSEE FRAGILE FERN
File Size: 81 KB
 
Cystopteris tennesseensis  Shaver
Woodson County, Kansas
Perennial
Height: To 12 inches
Family: Dryopteridaceae - Wood Fern Family
Flowering Period:   May, June, July, August, September
Also Called: Tennessee bladder fern.
Culms: 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.
Habitat: Moist woodlands, shaded limestone or sandstone crevices or ledges.
Distribution: East 1/2 of Kansas
Origin: Native
Uses: The Cherokee took a compound infusion for chills and the Navajo applied a cold, compound infusion on injuries.
Comments: The leaves die back in winter. Cystopteris, Greek "Kystos", bladder, and "pteris", fern, alluding to the inflated indusium when young.

Tennessee Fragile Fern
97 KB
Woodson County, Kansas
Tennessee Fragile Fern pinnules and sori
68 KB
Woodson County, Kansas