Incertae sedis Botryolepraria lesdainii Growth type crustose Chemical reactions negative Widespread on shaded calcareous rocks and walls, limestone and mortar where there is protection from direct rainfall. Diffuse, spongy, apple-green or blue-green thallus without isidia or soredia. Abundant free hyphae forming network with frequent septa, clusters of photobiont cells at ends of hyphal branches.

Botryolepraria lesdainii
Steeple, Dorset. February 2014