Is moss a plant or fungi, or something else. In this video, you will learn the basics of the amazing plant called moss. Mosses are small flowerless plants that typically grow in dense green clumps or mats, often in damp or shady locations. The individual plants are usually composed of simple leaves that are generally only one cell thick, attached to a stem. Moss are non-vascular plants. Non-vascular plants are plants without a vascular system consisting of xylem and phloem Without a vascular system, mosses, cannot grow very large. They are rarely taller than one inch high. After I crossed another bridge and headed up a trail it looked like a garden of moss. Moss carry out photosynthesis in order to produce glucose. Another important characteristic of these little is that they require water to reproduce. While all plants need water, mosses need droplets of water to enable their reproductive cells to combine. Moss are grouped in the class Bryophyta Mosses reproduce with spores that m