Volvariella rava sp nov from southern China

Volvariella rava, a new grey species collected from Guangzhou City in southern China, is described, illustrated, and compared with closely related taxa of Volvariella. The new species is characterized by a medium-sized basidiome and greyish brown appressed-fibrillose pileus; it closely resembles V. volvacea but differs by its smaller spores. Molecular analysis based on nrITS sequences confirmed that V. rava is distinct from other morphologically similar Volvariella species.