Equisetum myriochaetum

Equisetum myriochaetum, also known as Mexican giant horsetail, is a species of horsetail that is native to Nicaragua, Costa Rica, Colombia, Venezuela, Ecuador, Peru and Mexico.
It is the largest horsetail species, commonly reaching, with the largest recorded specimen having a height of. At each node is a whorl of as many as 32 branchlets. It is semi-aquatic and is often found growing on riverbanks.
The species is harvested for medicinal use. In Mexico, the species is harvested and sold to treat kidney disease and type 2 diabetes. It has traditionally been used as a diuretic.