Notes on new Agaricales of Japan 1

Abstract

Three new species of Agaricales are described and illustrated from eastern Honshu, Japan: Collybia effusa sp. nov. (section Levipedes), forming a distinctly sulcate-striate pileus and distant lamellae, was found on dead twigs of Cryptomeria japonica and Callicarpa japonica; Collybia macrosperma sp. nov., forming cylindrical-fusoid, relatively large-sized basidiospores and whitish basidiomata densely covered with fine, soft hairs, was found on dead fallen twigs in a Carpinus and Quercus forest; Marasmiellus gregarius sp. nov. (subsection Ramealini of section Rameales). forming small, pale colored pilei and diverticulate cheliocystidia, was found on dead twigs of Hydrangea involucrata and Trachelospermum asiaticum.