americana (native to America)
amurensis (Amur river region-China)
canadensis (northeastern United States)
japonicus (native to Japan)
koreana (native to Korea)
novae-angliae (from New England, U.S.A.)
occidentalis (western)
orientalis (eastern, from the orient)
pensylvanicus (from Pennsylvania, U.S. A.)
sinensis (from China)
virginica (of Virginia, U.S.A)