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Asia-Temperate China China North-Central China South-Central China Southeast Tibet Introduced into Africa Middle Atlantic Ocean Ascension South Tropical Africa Zambia Zimbabwe West-Central Tropical Africa Cameroon Rwanda Asia-Temperate Caucasus Transcaucasus Eastern Asia Japan Middle Asia Uzbekistan Asia-Tropical Indian Subcontinent East Himalaya Pakistan West Himalaya Indo-China Vietnam Malesia Malaya Australasia Australia Tasmania New Zealand New Zealand North New Zealand South Europe Middle Europe Belgium Czechoslovakia Germany Hungary (Rare) Netherlands Poland Switzerland Northern Europe Great Britain Ireland Southeastern Europe Bulgaria Greece Italy Romania Southwestern Europe Corse France Spain Northern America Eastern Canada Ontario North-Central U.S.A. Illinois Missouri Northeastern U.S.A. Connecticut Masachusettes Michigan New Jersey New York Ohio Pennsylvania Rhode I. West Virginia Northwestern U.S.A. Oregon Washington Southeastern U.S.A. Alabama Delaware District of Columbia Georgia Kentucky Maryland North Carolina South Carolina Tennessee Virginia Southwestern U.S.A. California Western Canada British Columbia Southern America Brazil Brazil South Brazil Southeast Caribbean Cuba Puerto Rico Trinidad-Tobago Northern South America Venezuela Southern South America Argentina South Western South America Colombia Ecuador Peru