Horsetails; coextensive with the family Equisetaceae; Also called: genus Equisetum.
horsetail / hɔːrstel /
Perennial 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 America.
Plant of the genus Equisetum, related to ferns and club mosses; some species are also called scouring rush.
There are about 35 living species, bearing their spores on cones at the stem tip. The upright stems are ribbed and often have spaced whorls of branches. Today they are of modest size, but hundreds of millions of years ago giant treelike forms existed. horse tail
Any of a genus (Equisetum of the order Equisetales) of lower tracheophytes comprising perennial plants that spread by creeping rhizomes and have leaves reduced to nodal sheaths on the hollow jointed ribbed shoots