Tricholoma equestre

Tricholoma equestre was considered edible until being implicated in serious poisonings causing rhabdomyolysis.

Cycloprop-2-ene carboxylic acid is a toxic molecule found in some mushrooms such as Russula subnigricans and Tricholoma equestre.

Tricholoma equestre poisoning "About Health Canada" article on Tricholoma equestre poisoning.

Suillus bovinus tastes mild and is edible, although it was left for the medieval peasants while medieval French knights allegedly reserved the highly regarded Tricholoma equestre for themselves.