n. 紫萁(薇的一种)

[ noun ]
any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters
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Osmund \Os"mund\, n. (Bot.)
A fern of the genus {Osmunda}, or flowering fern. The most
remarkable species is the {osmund royal}, or {royal fern}
({Osmunda regalis}), which grows in wet or boggy places, and
has large bipinnate fronds, often with a panicle of capsules
at the top. The rootstock contains much starch, and has been
used in stiffening linen.