Selaginellas are usually found in tropical and subtropical regions and often grow on damp forest floors. Selaginellas have small thin leaves and their stems may either grow upright or along the ground. Horsetails are a group of small perennial plants that spread by creeping rhizomes and have leaves reduced to nodal sheaths on hollow jointed ribbed shoots. Tiny amounts of concentrated minerals are found in the stems of horsetails, one such being silica, which is what gives the stems the texture of sandpaper. Some species of horsetails are called scouring rush because people once used these plants to scour pots and pans.
Bryophytes are a group of plants made up of mosses, liverworts, and hornworts.
Bryophytes can be found in almost all ecoregions of the world, from the frigid Arctic to warm tropical forests. They are the only types of plants that are non-vascular. None of these plants have true roots as we typically recognize on trees and flowers, they have hairy rootlike growths called rhizoids that anchor the plants to soil and other objects and absorb water and minerals. EcoWorld , All Rights Reserved EcoWorld and EcoWorld Tours are registered Trademarks of EcoWorld Inc.