 In Europe , other similarly green @-@ capped species collected by mushroom hunters include various green @-@ hued brittlegills of the genus Russula and the formerly popular Tricholoma equestre , now regarded as hazardous owing to a series of restaurant poisonings in France . Brittlegills , such as Russula heterophylla , R. aeruginea , and R. virescens , can be distinguished by their brittle flesh and the lack of both volva and ring . Other similar species include A. subjunquillea in eastern Asia and A. arocheae , which ranges from Andean Colombia north at least as far as central Mexico , both of which are also poisonous . 
