Definition of rasp fern in English:

rasp fern

noun

  • A small robust fern with prickly toothed edges to the lobes, growing in woodland and rainforests in Australasia and Polynesia, typically in rocky crevices.

    Genus Doodia, family Blechnaceae

    • ‘The Rasp fern also contains a powerful hormonal insecticide that kills larval stage insects.’