Polypody (Polypodium vulgare) is a perennial fern of the family Polypodiaceae, common to Britain and Europe. It has a creeping, slightly flattened, branched rhizome, which bears numerous red-brown scales. Every year new fronds rise alongside the old ones. The fronds are simple, long- stalked, smooth and pinnately divided with lanceolate segments, r... Found on http://www.probertencyclopaedia.com/browse/BPA.HTM