First person to use this name on MO: Joseph D. Cohen
This MO Name corresponds to Hydnum cf. umbilicatum of Niskanen et al. The type of Hydnum umbilicatum sensu strictu is from New York; there are are probably 3 other species hiding under that name:
The intraspecific variation (nine substitutions and indel positions, >1.5% between the two most divergent specimens) observed in H. cf. umbilicatum is so large that H. cf umbilicatum probably represents a species complex. The group can tentatively be divided into four taxa that would seem to have a non-overlapping distribution: Eurasia, central Europe, eastern North America, and western North America.
Niskanen, et al. 2018. “Identifying and naming the currently known diversity of the genus Hydnum with an emphasis on European and North American taxa.” Mycologia https://doi.org/10.1080/00275514.2018.1477004.