944 Alyssum calycinum L.

Syn.: A. alyssoides (L.) L.

This species originates from Europe. As it is a ruderal plant, it has been introduced into several parts of the world fairly recently, for instance into Fennoscandia during the 19th century and into N. and S. America and New Zealand. Cf. also Meusel et al. 1965, map p. 183.