Notes on three white Amanitae of section Phalloideae (Amanitaceae) from China

Three taxa of the genus Amanita section Phalloideae with white basidiocarps are described and illustrated. They are A. exitialis, A. oberwinklerana an d A. subjunquillea var. alba. The first species is new to science, while th e second is new for China. Known distribution range of the third taxon in C hina is widely extended. Amanita exitialis is lethal, while the other two t axa are supposed to be also very poisonous. The holotype of A. exitialis is deposited in the Mycological Herbarium of Guangdong Institute of Microbiol ogy (HMIGD).