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Fronde et spores d’un Polypode commun
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Chaque fronde oblongue et fortement divisée de cette fougère saxicole prend naissance directement sur un rhizome rampant qui mesure jusqu’à 30 centimètres de long.
Une fronde est composée de 15 à 20 segments lancéolés, alternés et confluents à la base de son implantation.
Les spores ronds sont situés en dessous des frondes, formant une rangée de part et d’autre de la nervure médiane. La sporulation lieu de mars à octobre.
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