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sword fern

noun

Definition of sword fern

: any of several ferns with long narrow more or less sword-shaped fronds: such 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

Recent Examples on the Web

Expanses of sword ferns, mixed with sorrel and wild blackberries, often fill the slopes. — Tom Stienstra, San Francisco Chronicle, "No-name waterfall a prize find on Mendocino coast," 8 Mar. 2018

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