979 Lepidium densiflorum Schrad.

This widespread species originates from N. America (including var. bourgeauanum [Thell.] Hitchc. In western N. America). It has been introduced into Europe and spread over W., C. and partly N. Europe, occurring occasionally in several places. Its occurrence is partly incompletely known. The closely related L. apetalum Willd. in C. and E. Asia is also mapped. Cf. also Meusel et al. 1965, map p. 178.