Equisetum hyemale, also called rough horsetail or scouring rush, is a non-flowering evergreen perennial. It has vertical green stems with horizontal bands, similar to bamboo, but the stems are skinny, like tall grass. Like ferns, horsetail reproduces through spores rather than seeds, as well as underground rhizomes. However, horsetail is not related to bamboo or grass or ferns.
Horsetail grows in wet conditions and can even grow in standing water. For this reason, it is commonly used to decorate water gardens or swampy areas where few other plants can survive. It’s also commonly grown as an accent along borders or in large patio pots, similarly to how ornamental grasses are used.