Acacia aestivalis is a species of flowering plant in the family Fabaceae and is endemic to the south-west of Western Australia. It is a bushy shrub or tree with linear to narrowly lance-shaped phyllodes, the narrower end towards the base, racemes of 5 to 11 spherical heads of golden-yellow flowers, and glabrous, papery to thinly leathery pods.
Acacia aestivalis is a bushy shrub or tree that typically grows to a height of and has glabrous branchlets. Its phyllodes are linear to lance-shaped with the narrower end towards the base, mostly long and wide, with 1 or 2 glands above the base of the phyllode. The flowers are arranged in racemes long, of 5 to 11 spherical heads, in diameter, each head on a hairy on a peduncle long. The heads contains 15 to 25 golden-yellow flowers. Flowering occurs from November to December and the pod is papery to thinly leathery, up to long and wide, containing dull dark brown, oblong seeds long with a brittle, reddish-brown aril on the end.[1] [2]
Acacia aestivalis was first formally described in 1904 by the botanist Ernst Georg Pritzel in Botanische Jahrbücher für Systematik, Pflanzengeschichte und Pflanzengeographie from specimens collected near Moora.[3] [4]
The specific epithet, aestivalis, is derived from Latin and means "pertaining to the summer".[5]
This species of wattle is endemic to an area in the Avon Wheatbelt, Coolgardie, Geraldton Sandplains, Jarrah Forest and Mallee bioregions of south-western Western Australia where it is frequently found along roadsides and on low-lying flats growing in clay, loamy or sandy soils. It is commonly a part of mid-storey of Eucalyptus salmonophloia woodland communities but will also form dense stands in disturbed areas.