Dictionary

sword fern

noun

Definition of SWORD FERN

:  any of several ferns with long narrow more or less sword-shaped fronds: as
a :  a tropical fern (Nephrolepis exaltata) from which the Boston fern has been developed
b :  a fern (Polystichum munitum) of western North America with a large fleshy rhizome

First Known Use of SWORD FERN

circa 1829

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