Acacia retrorsa

Acacia retrorsa is a shrub of the genus Acacia and the subgenus Phyllodineae that is endemic to western Australia

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The spreading prostrate shrub typically grows to a height of 0.05 to 0.5 metres (0 to 2 ft) with a sprawling habit. The multistemmed shrub has quite slender branches with a length of up to 1 m (3 ft 3 in) It has glabrous or slightly hairy, green coloured branchlets that have fine yellow-coloured ribbing. Like most species of Acacia it has phyllodes rather than true leaves. The sessile and evergreen phyllodes are pointing backwards. The pungent, green and glabrous have a linear shape and are straight to shallowly curved with a length of 15 to 25 mm (0.59 to 0.98 in) and a width of 1 to 2 mm (0.039 to 0.079 in) with a prominent midrib. It blooms from August to September and produces yellow flowers. The inflorescences occur on single headed racemes and have spherical flower-heads containing 16 to 24 light golden coloured flowers. The glarous, firmly chartaceous and dark brown seed pods that form after flowering resemble a string of beads and have a length of up to 6 cm (2.4 in) and a width of 3.5 to 4.5 mm (0.14 to 0.18 in). The blackish seeds have a yellow centre and have an oblong to elliptic shape with a length of about 4 mm (0.16 in) and have a club-shaped aril.