Nephrodium esculentum.
Botanical name:
Nephrodium esculentum Don. Filices.
In Nepal, says Unger, the rootstocks of this fern are eaten by the natives.
Sturtevant's Edible Plants of the World, 1919, was edited by U. P. Hedrick.
A herbal distance course
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.