-
Additions and Corrections to the Genera Filicum
Vol 40, Page 16, Date 1950
-
The Habitat of Diellia
Vol 40, Page 21, Date 1950
-
The Problem of Generic Segregates in the Form-Genus Lycopodium
Vol 40, Page 32, Date 1950
-
A New Erect Species of the Selaginella rupestris Group
Vol 40, Page 69, Date 1950
-
A New Interpretation of the Dryopteris Clintoniana Group
Vol 40, Iss 1, Page 118, Date 1950
-
Notes on Micronesian Pteridophyta
Vol 40, Iss 1, Page 132, Date 1950
-
A New Form of Lorinseria
Vol 40, Iss 2, Page 174, Date 1950
-
Notholaena Copelandii, a Newly Recognized Species of the Texano- Mexican Region
Vol 40, Iss 2, Page 178, Date 1950
-
Two Varieties of Cystopteris fragilis
Vol 40, Iss 3, Page 201, Date 1950
-
Notes on the Ferns of the Eastern United States
Vol 40, Page 213, Date 1950
-
Ctenitis vellea, a Neglected West Indian Fern
Vol 40, Iss 3, Page 226, Date 1950
-
Notes on the Ferns of the Eastern United States (Concluded)
Vol 40, Iss 4, Page 241, Date 1950