Lecanoraceae Lecanora pulicaris Growth type crustose Chemical results: K+ yellow, C-, KC-, P+ orange-red, UV- or bluish-white. Acid-barked twigs and branches and on wooden posts and fences. Smooth or warted yellow-white or greyish thallus, with or without a white or greyish prothallus. Discs reddish-brown, medulla with large crystals (not dissolving in K) and small granules (dissolving in K) on surface of epithecium and descending between paraphyses. Spores 11-15 x 8-10 µm. Micro photos below. Similar: Lecanora chlarotera has larger granules on the epithecium

Microscope photographs







Lecanora pulicaris
Studland, Pamphill, Wool and Broadstone, Dorset. October 2012, November 2016, March 2017, January 2024