(form order Agonomycetales)
A form genus of imperfect lichens, in which the thallus is powdery and indeterminate. L. incana forms pale greenish-grey powdery crusts in damp, shady places, e.g. on tree roots; it is common. L. candelaris forms bright, golden-yellow patches on tree trunks, especially in crevices in the bark of oak trees.
Subjects: Plant Sciences and Forestry.