saltbush n 1: any of various shrubby plants of the genus Atriplex that thrive in dry alkaline soil
Saltbush \Salt"bush`\, n. (Bot.) An Australian plant ({Atriplex nummularia}) of the Goosefoot family. [1913 Webster]
Atriplex \Atriplex\ n. a genus of plants of the goosefoot family ({Chenopodiaceae}); its members include species called {orach} and {saltbush}. Syn: genus {Atriplex}. [WordNet 1.5]