Dr. Nur Ritter notes (personal communcation) that Equisetum giganteum
is a relatively uncommon component of Bolivian wetlands, but tends
to cover large areas of the wetland systems it inhabits. He also
mentions that it is "one of the few wetland species that I've encountered
in both the Dry Interandean Valleys and the wet montane (i.e. cloud forest)
habitats on the other (eastern) side of the Andes. It also gets into
the lowlands, as well."