It has only recently been recognized again that the name Chenopodium rhombifolium WILLD. belongs to the clan which up to now has been known as Chenopodium intermedium MERT. & W.D.J.KOCH. In the younger past the clan which is found in Western Europe has usually been understood as variety of City Goosefoot Chenopodium urbicum which occurs in Eastern and Southern Europe. From true Chenopodium urbicum the clan differs by a wedge-shaped leaf base and deep teeth at the edges of the leaves. The first leaves of both clans in spring are however similarly equilateral triangular, only the smaller and more uniform theeth at the leaf edges of Chenopodiu urbicum are different. The seed branches of strong plants of Chenopodium urbicum in autumn are standing vertically directly at the stem (similar to a rod), while those of Chenopodium rhombifolium are sticking out in an acute angle. There are old herbarium sheets from the upper Rhine valley near Mannheim showing Chenopodium urbicum, too, but today only Chenopodium rhombifolium is still found in the region. French botanists see Chenopodium rhombifolium as closely related to Chenopodium rubrum. Chenopodium rhombifolium might have evolved hybridogenously from Chenopodium urbicum and Chenopodium rubrum.