| russula albonigra | | USA: CA, Santa Cruz County, intersection of Empire Grade and Pine Flat Road | | 528324017 |
| russula albonigra | | USA: CA, Santa Cruz County, Scotts Valley, Mission Springs grounds | | 528324016 |
| russula albonigra | | USA: CA, Mendocino Co., Jackson State Demonstration Forest, Mushroom Corner, Rd 409 & Little Lake Rd. | | 528324015 |
| russula albonigra | | USA: CA, Mendocino Co., Jackson State Demonstration Forest, Camp One, 5 miles east of Ft. Bragg off HW 20 | | 528324014 |
| russula albonigra | | USA: California | | 357433450 |
| russula albonigra | | USA: California | | 354804106 |
| russula albonigra | | USA: California | | 354508773 |
| russula albonigra | | USA: California | | 354508730 |