Equisetum bogotense, the Andean horsetail, is a herbaceous perennial that reproduces through spores.

It has thicker, less bushy[clarification needed] whorled branches, and a silica rich rhizomatous stem, which roots grow out of, under ground.

This stem is a dull dark brown color with glabrous growth aside from the sheathed segments.

The plant has a history as a traditional herbal remedy, and a study of its diuretic effects on humans showed significant increases in urinary sodium, potassium, and chloride.

According to a recent study,[3] this species may be the most isolated of all the genus, as it is more closely related with fossil Equisetums rather than living ones.