Macrolepiota subcitrophylla sp. nov., a new species with yellowish lamellae from southwest China

Macrolepiota subcitrophylla sp. nov. is described from Yunnan and Hunan Provinces, China. Morphologically, it is characterized by its yellowish lamellae, relatively small, ovoid to subamygdaliform-ellipsoid, dextrinoid basidiospores with distinct germ pore, narrowly clavate, clavate to subfusiform cheilocystidia, and a pileus covering composed of a trichoderm of subcylindrical hyphae. Sequences from the internal transcribed spacer region show that M. subcitrophylla is distinct from all other Macrolepiota species tested, suggesting it is a taxon close to M. clelandii, a species originally described from Australia.