Name requested: Conocybe siliginea var. ambiguaSydowia 4 (1-6): 118.
Homotypic synonym: Conocybe ambiguaMycologia 51 (3): 389, 393, 394, 395. Mycology and Phytopathology [as Микология и Фитопатология] 11 (3): 179. Mycotaxon 75: 453. 82: 184. Persoonia 18 (2): 241.