Familia:Equisetaceae
Genus:Equisetum
Subgenera:E. subg. Equisetum –E. subg. Hippochaete –E. subg. Paramochaete
Species (18):E. arvense –E. bogotense –E. braunii –E. diffusum –E. fluviatile –E. giganteum –E. hyemale –E. laevigatum –E. myriochaetum –E. palustre –E. praealtum –E. pratense –E. ramosissimum –E. scirpoides –E. sylvaticum –E. telmateia –E. variegatum –E. xylochaetum

Nothospecies:E. × alsaticum –E. × ascendens –E. × bowmanii –E. × dycei –E. × ferrissii –E. × fontqueri –E. × geissertii –E. × haukeanum –E. × jesupii –E. × lapponicum –E. × litorale –E. × lofotense –E. × mchaffieae –E. × meridionale –E. × mildeanum –E. × montellii –E. × moorei –E. × nelsonii (*) –E. × robertsii –E. × rothmaleri –E. × schaffneri –E. × sergijevskianum –E. × trachyodon (*) –E. × wallichianum –E. × willmotii
(*): stabilized hybrids also treated as full species

Fossil species: †E. clarnoi – †E. magnum – †E. newberryi – †E. thermale

Names in synonymy:E. rinihuense –E. × hybridum –E. × naegelianum

EquisetumL., Sp. Pl. 2: 1061 (1753); Gen. Pl., ed. 5: 484 (1754).

• Lectotype species:Equisetum fluviatileL. (designated byN.L. Britton &A. Brown, Ill. Fl. N.U.S. ed. 2. 1: 39 (7 Jun 1913)), supported byHauke, Nova Hedwigia 30: 414 (1978).

• Homotypic
  • PreslaDulac, Fl. Dépt. Hautes-Pyrenees: 25 (1867),nom. superfl.
• Heterotypic
  • AllostelitesBörner, Fl. Deutsche Volk: 59, 283 (1912).
    • Typus:Allostelites arvensis (L.)Börner [=Equisetum arvenseL.].
  • HippochaeteMilde, Bot. Zeit. (Berlin) 23: 297 (1865).
    • Lectotype (designated byFarwell 1916: 462):Hippochaete hyemalis (L.)Börner [=Equisetum hyemaleL.].

• Linnaeus, C. 1753.Species Plantarum. Tomus II:1061.Reference page. 
• Linnaeus, C. 1754.Genera Plantarum, ed. 5:484.Reference page. 

• Britton, N.L. &Brown, A. 1913.An illustrated flora of the northern United States, Canada and the British possessions: from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. ed. 2. C. Scribner's sons, New York. Vol. 1:39.Reference page. 
• Channing, A.,Zamuner, A.,Edwards, D. &Guido, D. 2011.Equisetum thermale sp. nov. (Equisetales) from the Jurassic San Agustin hot spring deposit, Patagonia: Anatomy, paleoecology, and inferred paleoecophysiology.American Journal of Botany 98(4): 680–697.DOI:10.3732/ajb.1000211PMID:21613167.Reference page. 
• Christenhusz, M.J.M.,Bangiolo, L.,Chase, M.W.,Fay, M.F.,Husby, C.E.,Witkus, M. &Viruel, J. 2019. Phylogenetics, classification and typification of extant horsetails (Equisetum, Equisetaceae).Botanical Journal of the Linnean Society 189(4): 311–352.DOI:10.1093/botlinnean/boz002.Reference page. 
• Guillon, J.-M. 2004. Phylogeny of horsetails (Equisetum) based on the chloroplast rps4 gene and adjacent noncoding sequences.Systematic Botany 29(2): 251–259.DOI:10.1600/036364404774195467.JSTOR.PDF.Reference page. 
• Hauke, R.L. 1978. A taxonomic monograph ofEquisetum subgenusEquisetum.Nova Hedwigia 30: 385–455.Reference page. 
• Stanich, N.A.,Rothwell, G.W. &Stockey, R.A. 2009. Phylogenetic diversification ofEquisetum (Equisetales) as inferred from Lower Cretaceous species of British Columbia, Canada.American Journal of Botany 96(7): 1289–1299.DOI:10.3732/ajb.0800381.Reference page. 

• Farr, E.R. &Zijlstra, G. (eds.) 1996 onwards.Equisetum inIndex Nominum Genericorum (Plantarum). Accessed: 2018 Sep 13.Reference page. 
• Govaerts, R.et al. 2019.Equisetum inKew Science Plants of the World Online. The Board of Trustees of theRoyal Botanic Gardens, Kew. Published online. Accessed: 2019 Nov 14.Reference page. 
• Hassler, M. 2018.World Ferns. Checklist of Ferns and Lycophytes of the World. (Version 7.50 – June 2018).Equisetum Accessed: 13 Sep 2018.Reference page.
• International Plant Names Index. 2025.Equisetum. Published online. Accessed: Oct. 1 2025.Reference page.

For more multimedia, look atEquisetum onWikimedia Commons.

• Carolus Linnaeus taxa

• Pages with taxonavigation templates
• Pages with vernacular names