WordNet (r) 3.0 (2006):

leather fern
    n 1: stout tropical swamp fern (especially tropical America)
         having large fronds with golden yellow sporangia covering
         the undersides [syn: golden fern, leather fern,
         Acrostichum aureum]
    2: widely distributed fern of tropical southern hemisphere
       having leathery pinnatifid fronds [syn: leather fern,
       leatherleaf fern, ten-day fern, Rumohra adiantiformis,
       Polystichum adiantiformis]