Definition of "ferndom"

In ferndom all people are divided into two classes: the first, those who are in profound ignorance of these beautiful forms in the vegetable kingdom; the second, those who know almost everything about them and are full of enthusiasm, [...]

1921, The Maine Naturalist

Staghorn ferns, with their antlerlike leaves, are really curios of ferndom and never fail to gain attention.

2013, Joan Lee Faust, The New York Times Garden Book, Revised