This group includes mushroom of various types which are less commonin a particular region or country. On this count, Oyster, Paddy Straw, Shiitake, Black Ear, White Milky, Winter Mushrooms fall under this category. The demand for these mushrooms, in recentyears, has shown an upward tendon account of its novelty and medicinal value, fetching highprices in the global market. The Indian sub-continent is endowed with varied agro climatic conditions for growing these mushrooms.