lecanora

Types:

manna lichen

any of several Old World partially 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

Type of:

lichen

any thallophytic plant of the division Lichenes; occur as crusty patches or bushy growths on tree trunks or rocks or bare ground etc.