| united states | delaware | amanita sp. 'williamsiae' | species | 1 | 0 |
| united states | florida | amanita sp. 'williamsiae' | species | 2 | 0 |
| united states | new jersey | amanita sp. 'williamsiae' | species | 6 | 0 |
| united states | new york | amanita sp. 'williamsiae' | species | 2 | 0 |
| united states | south carolina | amanita sp. 'williamsiae' | species | 1 | 0 |