Microbotryum arcticum on Silene uralensis subsp. arctica. A Habit (holotype) B, C spores in LM, in median and surface view, respectively (holotype) D–F spores in SEM (D leg. P. Frykman & B. Fredskild, s.n., C-Greenland herb., s.n.; E, F SOMF 29 998) G distribution map. – A, D, E reproduced, with permission, from Denchev et al. 2019. Scale bars: 0.5 cm (A); 10 µm (B, C); 5 µm (D–F); 500 km (G).