by William R. Maxon
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Report upon a collection of ferns from T...
Some species of Notholaena, new and old
Notes on the validity of Asplenium ebeno...
A new cloak-fern from Mexico
New or critical ferns from Haiti
Pteridophyta of Porto Rico and the Virgi...
The American ferns of the group of Dryop...
A revision of the fern genus Dryopteris ...
K morfologii spor
An analysis of the mating system of the ...
The American species of Dryopteris, subg...
Chemotaxonomic investigations on Finnish...