fungi
n. (plural form of fungus) any of a group of unicellular, multicellular, or syncytial
spore-producing organisms feeding on organic matter, including molds, yeast,
mushrooms, and toadstools

moss
n. a small flowerless green plant that lacks true roots, growing in low carpets or
rounded cushions in damp habitats and reproducing by means of spores
released from stalked capsules

lichen
n. a simple slow-growing plant that typically forms a low crustlike, leaflike, or
branching growth on rocks, walls, and trees