Lomaria discolor, synonym Blechnum discolor, commonly called crown fern (Māori: piupiu),[2] is a species of fern in the family Blechnaceae.

This species is endemic to New Zealand.

[3] As noted by C. Michael Hogan, this species is found in a number of forest communities in diverse locations within New Zealand, and is sometimes a dominant understorey component.

[4] Spores are produced on specialised fronds.

This Polypodiales-related article is a stub.