Atriplex paludosa subsp. baudinii is subspecies of Atriplex paludosa (marsh saltbush) that is endemic to Western Australia.
It grows as an erect shrub up to a metre high. Leaves are oval in shape, one to four centimetres long, 2 to 15 millimetres wide, and scaly all over.[1]
It was first published as Atriplex paludosa var. Baudini by Alfred Moquin-Tandon in 1849, based on specimens collected by during the Baudin expedition. The orthography of Baudini was later altered to baudinii. At the same time, Moquin-Tandon published Atriplex drummondii, based on specimens collected by James Drummond, but the latter name is now considered a taxonomic synonym of the former. In 1938, Paul Aellen promoted the variety to subspecies rank. At the same time, the inexplicably published Atriplex paludosa var. typica for this taxon, a name that is invalid, illegal and superfluous.
It occurs almost exclusively within the Southwest Botanical Province of Western Australia.