Mushrooms were grown in the underground caverns of Paris in the 17th century. Taiwan and China have a large export trade in Mushrooms. In order of decreasing cultivated tonnage in the East are Lentinus (Shiitake), Pleurotus (Oyster), Auricularia (Bai mu er), Flammulina (Enokitake), Tremella (Yin er), Hericium, and Grifola (Maitake). The Champignon mushroom (Agaricus bisporus) originated in France. Today's commercial variety of the Champignon (also known as the button mushroom) was originally a light brown colour, but mutated into the type with white caps which has now become the predominant commercial variety.