⚠ Version 1 of The Plant List has been superseded.
This name record (from Tropicos) is not included in version 1.1 of The Plant List. It is possible the same name is included from a different data source, to check this you can search for Sisymbrium niveum in version 1.1 of The Plant List.
This name is a synonym of Mathewsia nivea .
The record derives from Tropicos which reports it as a synonym (record 50226093
) with original publication details: Fl. Atacam. 8, pl. 1, f. A, 1-5 8 1860.