Most certain plant ID's?

[Scarecrow]

You are not allowed to view links. Register or Login to view. is my final suggestion for f3r, at least for now, and I list it mainly because it is similar to, and was once considered a subspecies of, P. vulgare, similarly native and widespread in Europe as well as having entered in the taxonomy the same year (1753). It was the only other Polypodium fern I found that was similar enough to f3r. However, unlike P. vulgare, I couldn't find an archaeological or other reference placing it in the Medieval period, not even its original name P. australe Fée. The plant in f3r could be either fern species.

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According to the UK Plant Heritage Society, the oldest named cultivar is Polypodium cambricum ‘Richard Kayse’ which dates back to at least 1668. 
The species records date back to at least 1491! Polypodium has a long history and for many years the American and European species were all classed as P. vulgare.

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