Neither mosses nor their close relatives the liverworts, have roots. Hairlike fibers called rhizoids anchor these plants in place. Both cling to sheltered rocks, moist soil, and the shady side of trees. Mosses and liverworts are nonvascular, without the long tubelike structures that vascular plants have. These are tiny plants, only 2 to 5 centimeters high. Mosses’ leaves grow only one or two cells thick. Mosses resemble green, fuzzy pillows. Liverworts look like flat leaves. Both are seedless plants, growing from spores.