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quillwort n.【植物;植物學】水韭。

quilt

A very small tongue - shaped flap of tissue inserted on the upper surface of the leaves ( microsporophylls ) and sporophylls of certain clubmosses ( e . g . selaginella ) and quillworts ( isoetes ) 某些石松門(如卷柏)和水韭類植物(水韭屬)的孢子葉上具有的一種極小的舌狀結構, 。