Microbotryum silenes-dioicae  

Sori in anthers. Spore mass powdery, brown vinaceous.
Spores 6.5–10.5 × 5.5–9 μm, globose, subglobose or broadly ellipsoidal, pale coloured, the wall reticulate, with 6–8 (–9) meshes per hemisphere, meshes irregularly polygonal; in SEM interspaces smooth, rarely some with very low warts.