Russula granulata new to Japan, collected in mixed subalpine forests of Nagano Prefecture

Abstract

We report the first record of Russula granulata in Japan, based on morphological characteristics and phylogenetic positions of the specimens collected in mixed subalpine forests in Nagano Prefecture. The species was characterized by a medium-sized fruiting body that is grayish orange to reddish-brown, a strongly viscid pileus with yellowish-red to reddish-brown centers, and a whitish stipe that exhibits light brown discoloration on the lower half. Phylogenetic analyses showed that the Russula specimens from Japan placed within a clade comprising R. granulata from North America and Eurasia.