LT: Equisetum fluviatile L. LT designated by Hauke, Nova Hedwigia 30 : 423 (1978); LT also designated by Farwell, Mem. New York Bot. Gard. 6: 464 (1916) but this ineffective under the American Code, (Equisetum arvensis is sometimes regarded as LT; see discussion by Pichi Sermolli, Webbia 26: 179. 1971)

• Lectotype designated by:  Hauke, R. L. 1978. A taxonomic monograph of Equisetum subg. Equisetum. Nova Hedwigia 30: 414. 

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