(i) Corticolous : This lichen grows on the bark or stems of trees in tropical regions. Like- Graphis scripta, Evernia prunastri, Parmelia sulcata, Usnea barbata etc.
(ii) Terricolous : They grow in moist and upland soils. For example – Collema tenax, Cladonia leporina, Lecidea atrobrunnea, Cora pavonia etc.
(iii) Sexicolous : They grow on rocks or rocks in temperate regions. Such as Xanthoria calcicola, Aspicilia contorta, Dermatocarpon miniatum etc.
(iv) Lignicolous: They grow on wet wood. Such as Calicium lenticulare, Chaenotheca trichialis, Cyphelium notarisii, Piptoporus betulinus etc.
(v) Foliicolous : They grow on the leaves of ferns or succulent plants. Like Porina epiphylla, Strigula angulul etc.
(vi) Omnicolous : They grow on leather, wood, iron etc. For example, Lecanora dispersa.