New evidence on the hybrid nature of Asplenium kentuckiense

Asplenium platyneuron

Asplenium platyneuron (syn. Asplenium ebeneum), commonly known as ebony spleenwort or brownstem spleenwort, is a fern native to North America east of the Rocky Mountains…

Asplenium × trudellii

Asplenium × trudellii, commonly known as Trudell's spleenwort, is a rare hybrid fern of the eastern United States, first described in 1925.

Asplenium × wherryi

Asplenium × wherryi, known as Wherry's spleenwort, is a rare hybrid fern of the Appalachian Mountains.

Asplenium × gravesii

Asplenium × gravesii, commonly known as Graves' spleenwort, is a rare, sterile, hybrid fern, named for Edward Willis Graves (1882–1936).

Asplenium × kentuckiense

Asplenium × kentuckiense, commonly known as Kentucky spleenwort, is a rare, sterile, hybrid fern.