Oyster mushrooms, pleurote champignons, Pleurotus ostreatus, grow in troglodyte cave in Loire Valley, France

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