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nounany of several spore-bearing aquatic or marsh plants having short rhizomes and leaves resembling quills; worldwide except Polynesiatype of:
Definition that contains quillwort
- isoetaceae quillworts; coextensive with the genus Isoetes
- quillwort family quillworts; coextensive with the genus Isoetes
- family isoetaceae quillworts; coextensive with the genus Isoetes