Two new species of Inocybe, section Marginatae (Agaricales, Cortinariaceae) from Japan

Two new species of the section Marginatae are described, namely, Inocybe populea sp. nov. and I. leptoclada sp. nov., from western Japan and eastern Japan, respectively. Inocybe leptoclada is assigned to section Marginatae, even though it lacks a marginate bulb. Inocybe populea is placed in the section Marginatae because of the presence of a marginate (often indistinct) bulbous base of stipe and the caulocystidia throughout. The discoveries of I. leptoclada and I. populea provide further evidence that section Marginatae and section Inocybe [= Cortinatae] are poorly defined