Apium australe

{{Short description|Species of flowering plant}}

{{Speciesbox

| image = Valeriana integrifolia Phil. - Flickr - Pato Novoa.jpg

| taxon = Apium australe

| authority = ThouarsJournal of the Adelaide Botanic Gardens

Vol. 1, No. 4 (2 April 1979), pp. 205-235

}}

Apium australe is a species of the genus Apium of the family Apiaceae. It is a perennial herb{{cite web|url= https://pfaf.org/user/Plant.aspx?LatinName=Apium+australe|title=Apium australe - Thouars.|publisher=Plants for a Future}} with a distribution in salt-marsh and saline habitats of Southern South America.Louis-Marie Aubert du Petit-Thouars, "Esquisse de la Flore de l'Isle de Tristan d'Acugna (1808)" [https://gallica.bnf.fr/ark:/12148/bpt6k939789c/f267 p. 43] in his Mélanges de botanique et de voyages (Paris: Arthus Bertrand, 1811).