Polypodium is a fun little fern also called rock polypody or polypodium vulgare. It is native to the Americas and parts of Asia, with some species from Africa. The polypody fern prefers moist ...

IN two recent publications 1,2 on the cytogenetics of “Polypodium vulgare” the situation in Europe has been made fairly clear. There are three distinct species (perhaps ecospecies), one of ...