Author:S. A. Whitmore Treatments PPolypodium Polypodium amorphum Polypodium appalachianum Polypodium californicum P cont.Polypodium calirhiza Polypodium glycyrrhiza Polypodium hesperium Polypodium saximontanum P cont.Polypodium scouleri Polypodium sibiricum Polypodium triseriale Polypodium virginianum