Pachypharynx neglecta Aellen Atriplex vesicaria, commonly known as bladder saltbush,[2] is a species of flowering plant of the family Amaranthaceae and is endemic to arid and semi-arid inland regions of Australia.

It is an upright or sprawling shrub with scaly leaves and separate male and female plants, the fruit often with a bladder-like appendage.

Female flowers are borne in clusters of two to many in upper leaf axils and lack a perianth, the ovary surrounded by two bracteoles.

[3][5][6][7][8] Atriplex vesicaria was first formally described in 1870 by George Bentham in Flora Australiensis from an unpublished manuscript by Robert Heward.

[13] In 1938, Paul Aellen described Pachypharynx neglecta in Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie,[14] but the name is considered a synonym by the Australian Plant Census.

[25] Male flowers appear continuously or interrupted in clusters[27] on thin, simple or branched terminal spikes or panicles.

[28] The fruiting body is 6-15 millimetres in diameter, green to cream coloured, mostly orbicular and membranous, with fine veins networked throughout and concealed by inflated spongy appendages,[28] with seeds held between bracts.

[33] The species is sensitive to grazing pressures and can experience heavy defoliation in periods of low rainfall when other perennial shrubs are unavailable.