Nelsia is a genus of flowering plants belonging to the family Amaranthaceae.

It is native to Angola, Botswana and Namibia.

[1] The genus name of Nelsia is in honour of Louis Nels (1855–1910), a German government official who served as acting Reichskommissar in German South West Africa in 1890–1891.

[2] It was first described and published in Vierteljahrsschr.

Zürich Vol.56 on page 247 in 1911.