polypodium vulgare

In California the subspecies Polypodium vulgare var.

The name Polypodium vulgare is sometimes applied to the Polypodium virginianum (rock polypody).

A close relative, Polypodium vulgare, was used historically in Europe up to the Renaissance to relieve coughing and treat mental illness.

For years, P. virginianum - long considered a variety of the British Polypodium vulgare - was recognized as having cryptic races, with diploid, triploid, and tetraploid representatives.

Indigenous ferns include Asplenium onopteris, Athyrium filix-femina, Phyllitis scolopendrium, Polypodium cambricum, Polypodium vulgare, Polystichum lonchitis, Polystichum aculeatum, and Polystichum setiferum.