Amanita augusta is a species of agaric fungus in the family Amanitaceae. Found in the Pacific Northwest region of North America, it was formerly referred to as Amanita franchetti sensu Thiers, but suspected of being a distinct species. It was formally described as a new species in 2013.
- Bojantchev D, Davis RM. (2013). "Amanita augusta, a new species from California and the Pacific Northwest" (PDF). North American Fungi. 8 (5): 1–11. doi:10.2509/naf2013.008.005. Archived from the original (PDF) on 2013-05-02. Retrieved 2013-04-15.