Quillwort definitions

kwĭl'wûrt', -wôrt'
Any of several vascular, spore-bearing, aquatic or marsh plants of the genus Isoetes, having quill-like leaves.
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Any of an order (Isoetales) of lycopods with short, fleshy stems and tufts of long, hollow, quill-like leaves whose bases contain spore cases.
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Any of various simple microphyllous vascular plants, of the family Isoetaceae, that resemble rushes and produce spores.
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