4. Lepidium densiflorum Schrad.

Lepidium densiflorum Schrad. 1832, Ind. Sem. Horti Gotting.: 4; Mühlenbach, 1934, Acta Horti Bot. Univ. Latv. 7: 112; Eleksis, 1955, Latv. PSR Fl. 2: 326; Vasc. 1964, Fl. Europ. 1: 332; Vasc. rev. Akeroyd and T. C. G. Rich, 1993, Fl. Europ., ed. 2, 1: 401; В. И. Дороф. 2012, Консп. фл. Вост. Европы, 1: 426.

L. neglectum Thell. 1904, Bull. Herb. Boiss. ser. 2, 4: 708; Rasiņš 1954, Latv. PSR nezāļu augļi un sēklas: 107.

L. apetalum auct., non Willd.: Kupffer, 1934, Korrbl. Naturf.-Ver. Riga, 61: 210; Н. Буш, 1939, Фл. СССР, 8: 508.

Habitat. Railway verges, street edges, roadsides, weed-laden sites.

Distribution in Latvia. Rather rare, in Coastal Lowland, Central Latvia and Eastern Latvia, alien species (Fig. 2).

G e n e r a l d i s t r i b u t i o n. North America, meridionale zone to boreale zone. Alien species in Europe, Asia.