Cyclocibe aegerita

''Cyclocybe aegerita'', also called'' Agrocybe cylindracea'', ''Agrocybe aegerita'' or ''Pholiota aegerita'', is a mushroom in the genus ''Cyclocybe'' which is commonly known as the ''poplar mushroom'' or ''velvet pioppini'' . In Japan, it is called ''Yanagi-matsutake'' .