Basket of Pied Blue mushrooms grown in former troglodyte cave at Le Saut aux Loups, in the Loire Valley, France

b2 riboflavin b3 niacin b5 blue foot mushroom crop cultivated cultivation europe european french fungus grow growing indoors inside mushroom mushrooms pied bleu mushrooms champignon champignons compost cultivate edible fungi food chain food production fresh growth potassium rich food stock image stock photo stock photograph travel photo travel photograph travel photography travel stock travels troglodyte cave upright vertical vitamin d source world travel travel destinations travel destination ethnic food traditional food french food foods french cuisine color image color colour tourism destination