References

Christenhusz, M.J.M., L. Bangiolo, M.W. Chase, M.F. Fay, C. Husby, M. Witkus, and J. Viruel. 2019. Phylogenetics, classification and typification of extant horsetails (Equisetum, Equisetaceae). Bot. J. Linn. Soc. 189: 311-352.