Tags: Fern.
Mankyua is a recently discovered plant a single species in its own genus. It is a fern in the Ophioglossales. Its only species M. chejuense grows only on a small Korean island Cheju Island.While this plant is clearly ophioglossoid in the broad sense its precise cladistic position is uncertain. It has a fused sporangial structure similar to Ophioglossum but a vegetative structure with palmately-radiating pinnae reminiscent of Helminthostachys.