Anthracoidea bigelowii on Carex bigelowii. A habit (C-F-107497) B, C spores in LM, in median and surface view, respectively (C-F-108011) D–F spores in SEM (D, E 13 Aug 1928, J. Eugenius, s.n., C-Greenland herb., s.n.; F C-F-102524) G distribution map (red circles – on Carex bigelowii; yellow circles – on hybrids of C. bigelowii; blue circle – on C. concolor). Scale bars: 0.5 cm (A); 10 µm (B, C); 5 µm (D–F); 500 km (G).