J
- Cortinarius jacobi-langei
- Cortinarius jacobii – France
- Cortinarius janthinocaulis
- Cortinarius janthinophaeus – Chile
- Cortinarius joannis
- Cortinarius josephii
- Cortinarius josserandii – France
- Cortinarius junghuhnii
Read more about this topic: List Of Cortinarius Species