
Nivatogastrium

Nivatogastrium is a genus of secotioid fungi in the family Strophariaceae. The genus has contained four species found in North America and New Zealand, but the type species is now considered to be a gasteroid species of "Pholiota", and was transferred to that genus in 2014.
Taxonomy.
The genus was circumscribed by American mycologists Rolf Singer and Alexander H. Smith in 1959, who set "N. nubigenum" (then known as "Secotium nubigenum" Harkness) as the type and only species. In 1971, Egon Horak described the species "N. baylisianum", "N. lignicola", and "N. sulcatum" from New Zealand.
The generic name is derived from two words, "nivatus" and "gastrion"; "nivatus" refers to the type locality, Sierra Nevada, and to the fact that the mature fruit bodies fade in color to white.