Microscopic features of the hymenium. a Basidia. b Basidiola. c Spores. d Gloeopleurocystidia. e Gloeocheilocystidia (no marginal cells differentiated). Gloeocystidia with indication of contents as observed in Congo Red for two elements, schematically in all other elements. Scale bars=10μm, but only 5μm for spores. Drawings B. Buyck