Anatomical characters of Lactifluus rugatus ectomycorrhizas (ACR-2015/1-E). A. Outer mantle surface, characterized by abundant cystidia. B. Plectenchymatous outer mantle mantle layer formed by frequently branched hyphae, hyphal segments and the basal roundish part of cystidia. C. Inner mantle layer with a densely plectenchymatous structure; a few hyphae with content (lactifers?) can be observed in some mantle preparations. D. Cystidia, mainly bottle-shaped, sinuous, with blunt tips; cell walls become thicker toward the base which is generally roundish, but sometimes more elongated. Bars = 5 µm.