Lecanoraceae Myriolecis sambuci (Lecanora sambuci) Growth type crustose. Chemical results negative Local distribution on nutrient-enriched bark, often in twig axils of Fraxinus, Populus tremula and Sambucus White or grey-white, minutely granular or continuous thallus without obvious prothallus. Small clustered or dispersed, grey-brown to pink-brown apothecia. Entire or slightly crenulate margins become +/- excluded. Asci are (8-)16-32 spored, spores simple, (6-)8-12 x 4-6(-7) µm and pycnidia frequent. Margins with small crystals in the upper, outer edges (visible under polarised light) and the epithecium occasionally has a few superficial granules. Micrographs below. Similar: Lecanora hagenii and Lecanora persimilis have 8-spored asci

Micrograph







Myriolecis sambuci (Lecanora sambuci)
Photographs: Kingston Lacy, Dorset. February 2024