Acacia depressa, also commonly known as echidna wattle, is a shrub of the genus Acacia and the subgenus Pulchellae that is endemic to south western Australia. It was listed as vulnerable according the Environment Protection and Biodiversity Conservation Act 1999 in 2007.[1]
The dense prostrate spreading shrub typically grows to a height of 0.05to and tends to form mats that can over in width with hairy and spiny branchlets. The milky green to grey-green, bipinnate and glabrous leaves have one pair of pinnae that are in length and have three to four pairs if pinnules which have narrowly oblong to oblong-oblanceolate shape and are in length and about wide. It blooms from December to January and produces yellow flowers. It forms simple inflorescences that occur singly in the axils and have spherical flower-heads that contain 12 to 15 light golden coloured flowers. Following flowering firmly chartaceous seed pods form that have a narrowly oblong shape with a length of and a width of around and have a somewhat thickened margin.
It is native to an area in the Wheatbelt region of Western Australia where it is commonly situated on low rocky hills and rises where it grows in gravelly lateritic soils. It has a limited distribution around Lake Grace as a part of low shrubland or open heath communities.[2]