 Linnaeus originally included all the species in one genus, "Geranium", but they were later separated into two genera by Charles L’Héritier in 1789.Other former members of the genus are now classified in "Erodium", including the plants known as filarees in North America.The term "hardy geranium" is often applied to horticultural "Geranium"s to distinguish them from the "Pelargonium"s, which are not winter-hardy in temperate horticulture.