P. x mantoniae

Polypodium x. mantoniae Rothm. & U. Schneider

In a similar position to P. interjectum but the sori are less oval. I checked the spores under the microscope and there were many abortive and shriveled spores, this is possibly the hybrid.

The fern was growing on the east facing side of the hedge bank.

[Polypodies] [interjectum] [P. x mantoniae]