Basidiomycota       Family: Corticiaceae Species: Laetisaria lichenicola # Growth type lichenicolous Photos: On Physcia tenella. Co. Limerick, Ireland. A pink lichenicolous basidiomycete that develops immersed in the host thallus. While the basiospores are being produced it becomes minutely powdery but then dssolves into a thin pink film. Probably widespread on the thalli of Physcia tenella but not recognised until 2015. Occasional on Xanthoria parietina. Micrographs below. Similar: Laetisaria macrospora, pinkish basidiomata on (usually) lower surface of Physcia adscendens and P. stellaris. Basidia have four sterigmata and larger basidiospores, 23-34 × 11-18 µm. Marchandiomyces corallinus with pink coralloid sclerotia. Illosporiopsis christiansenii with pink mounds of soft sporodichia

Micrographs



Laetisaria lichenicola #. October 2025