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nounperennial rushlike flowerless herbs with jointed hollow stems and narrow toothlike leaves that spread by creeping rhizomes; tend to become weedy; common in northern hemisphere; some in Africa and South Americatype of:
Definition that contains horsetail
- class sphenopsida horsetails and related forms
- genus equisetum horsetails; coextensive with the family Equisetaceae
- equisetatae horsetails and related forms
- sphenopsida horsetails and related forms
- class equisetatae horsetails and related forms
- equisetum horsetails; coextensive with the family Equisetaceae