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 ...

This is a single sorus of a rock polypody fern (Polypodium virginianum). Sori can be found on the underside of this tiny fern’s fronds. They consist of an assembly of spore-producing sporangia (1) and ...