Atlas of North European vascular plants
Hultén & Fries 1986
1228 Melilotus alba Med.
This originally Eurasiatic species is widely spread by human settlement in Europe, Africa, America, Australia etc. It is replaced eastwards by the closely related, small-flowered M. suaveolens Ledeb. Nowadays M alba belongs to the discontinuous circumpolar plants (Hultén, Circumpol. Il, p. 238 and map 230).