Definition of king fern in English:

king fern

noun

  • 1Australian a very large fern with erect bipinnate fronds, native to parts of Australia, New Zealand, and South Africa, Todea barbara (family Osmundaceae).

  • 2NZ the large tropical fern Marattia salicina; = "para".

Origin

Early 19th century; earliest use found in John Loudon (1783–1843), landscape gardener and horticultural writer.