The fern world.

Mode of access: Internet.

Fern Valley Trail guide /

"March 1986"--P. 15.

Flora of the southeastern United States; being descriptions of the seed-plants, ferns and fern-allies growing naturally in North Carolina, South Carolin, Georgia, Florida, Tennessee, Alabama, Mississippi, Arkansas, Louisiana and the Indian territory and in Oklahoma and Texas east of the one-hundredth meridian,

Mode of access: Internet.

Colorado fern and fern allies: Pteridophyta,

Mode of access: Internet.

Ferns of Florida; being descriptions of and notes on the fern-plants growing naturally in Florida (Illustrated)

"Authorities cited in the work": p. 226-228.

Fern etchings: illustrating all the species of ferns indigenous to the northeastern United States and Canada.

Commentary for each plate on preceding leaf

Ferns and fern allies of New Hampshire /

Includes bibliography (p. 88-91) and index.