Report upon a collection of ferns from western South AmericaWilliam R. Maxon · First published 1915Open the Tome
A new species of fern of genus Polypodium from JamaicaWilliam R. Maxon · First published 1905Open the Tome
On the names of three Jamaican species of PolypodiumWilliam R. Maxon · First published 1905Open the Tome
A study of certain Mexican and Guatemalan species of PolypodiumWilliam R. Maxon · First published 1903Open the Tome
Polypodium hesperium, a new fern from western North AmericaWilliam R. Maxon · First published 1900Open the Tome
