Pyrenula inspersa (LCUF HN17058) A thallus with apothecia B apothecia and pseudocyphellae C, F–H ascospores at different developmental stages, over-mature ascospores with orange-oil can be seen in C, F and H D section of apothecium E section visualised with polarised light showing cortex of apothecium with crystals, red stars in D–H show the inspersion in hamathecium I–K young ascospores, red arrows show gelatinous halo. Scale bars: 2 mm (A); 1 mm (B); 10 μm (C, I); 200 μm (D, E); 50 μm (F, H); 35 μm (G); 20 μm (J, K).