lecanora - any lichen of the genus Lecanora; some used in dyeing; some used for foodlichen - any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc. manna lichen - any of several Old World semi-crustaceous or shrubby lecanoras that roll up and are blown about over African and Arabian deserts and used as food by people and animals archil, orchil - any of various lecanoras that yield the dye archil |