- Candlesnuff Fungus
- Cedar-apple rust
- Ceramic parchment
- Chaga
- Chicken of the woods
- Chip Cherries
- Christmas lichen
- Cinnabar Bracket
- Cloudy Clitocybe
- Club-like tuning fork
- Common bird's nest fungus
- Common earthball
- Common greenshield lichen
- Common puffball
- Common Script Lichen
- Common stinkhorn
- Common Sunburst Lichen
- Conifer Mazegill
- Coral tooth fungus
- Crimped gill
- Crowded parchment
- Crown-tipped coral fungus