Answer: lichens

AnswerCrossword Clue
LICHENSFungus-alga unions
LICHENSGrowths on rocks or tree trunks
LICHENSRock growths
LICHENSRock plants
LICHENSPlants for rock gardens.
LICHENSMosses.
LICHENSMosslike growths
LICHENSFungous growths
LICHENSGrowths on tree trunks or rocks
lichensany of various eruptive disorders of the skin
lichensan organism that is formed by the symbiotic association of a fungus and an alga or cyanobacterium and occurs as crusty patches or bushy growths on tree trunks, bare ground, etc. Lichens are now classified as a phylum of fungi (Mycophycophyta)