Gyalectidium

Gyalectidium is a genus of lichen-forming fungi in the family Gomphillaceae. Established in 1881 by Swiss lichenologist Johannes Müller Argoviensis, the genus comprises about 50 species of predominantly leaf-dwelling lichens that form small, pale greenish to whitish-grey patches typically only a few millimetres across. Members are characterised by specialised asexual reproductive structures called , which are small scale-like outgrowths that produce propagules containing both fungal and algal partners, and by fruiting bodies that contain single, large, multi-chambered ascospores. The genus has