This is a mutation from P. superbum that is very rare and referred to as (Cabbage or Bambi stag). I was told that a man in South Wells had found two mature dwarf species in the forest and had collected the spore and when sowed came up true. A great addition to any fern collection, if you are a fan of the giant P. superbum you will find the cabbage to be a

favorite with its exaggerated ruffled fronds