[Ferns East of the Crest of the Cascade Mountains of Oregon and Washington]

Western Polypody

Polypodium hesperium

Synonyms: Polypodium prolongilobum, Polypodium vulgare var. columbianum, Polypodium vulgare var. hesperium

Western Polypody: Polypodium hesperium (Synonyms: Polypodium prolongilobum, Polypodium vulgare var. columbianum, Polypodium vulgare var. hesperium)

Western polypody as seen on north-facing rock faces at Kamiak Butte County Park, Whitman County, Washington.........June 10, 2013.

Dorsal surface of a frond of Western Polypody: Polypodium hesperium (Synonyms: Polypodium prolongilobum, Polypodium vulgare var. columbianum, Polypodium vulgare var. hesperium) - Lower frond surface (with sori) of Western Polypody: Polypodium hesperium (Synonyms: Polypodium prolongilobum, Polypodium vulgare var. columbianum, Polypodium vulgare var. hesperium) - Western Polypody: Polypodium hesperium (Synonyms: Polypodium prolongilobum, Polypodium vulgare var. columbianum, Polypodium vulgare var. hesperium)

Western polypody as seen on north-facing rock faces at Kamiak Butte County Park, Whitman County, Washington.........June 10, 2013.

Western Polypody: Polypodium hesperium (Synonyms: Polypodium prolongilobum, Polypodium vulgare var. columbianum, Polypodium vulgare var. hesperium) - Ventral side of the frond with sori of Western Polypody: Polypodium hesperium (Synonyms: Polypodium prolongilobum, Polypodium vulgare var. columbianum, Polypodium vulgare var. hesperium)

Close-up view of the sori arranged on the ventral frond surface of what may be western polypody as seen along the Angels Rest trail in the Columbia River Gorge......May 18, 2009.
Paul Slichter