2 links
Equisetaceae
botany.hawaii.edu
General description of this family of terrestrial, herbaceous, homosporous vascular plants, comprising a single genus with about 15 species. Includes photos of several Equisetum sp…
Horsetails - Equisetaceae
bodd.cf.ac.uk
Brief description of the horsetail family, including descriptions of several Equisetum species.