Acacia subtessarogona

Acacia subtessarogona, commonly known as spreading gidgee, is a tree in the family Fabaceae and the subgenus Juliflorae that is native to a small area in western Australia.

Description

Spreading gidgee grows as an upright tree to a height of up to and has ribbed branchlets that are densely hired between each of the ribs. Like most Acacia species, it has phyllodes rather than true leaves. These are flat, curved, and have a length of about and a width of and have longitudinal striations. When it between July and October it produces simple inflorescences that occur in groups of one to five in the axils on long stalks. The flower-heads are a short cylindrical shape with a length of and densely packed with yellow flowers. The seed pods that form after flowering have a length of with a distinctive groove along each edge. The seeds insode are long and have an obloid shape.

Distribution

Endemic to Western Australia, it occurs only in a small area of the Gascoyne River catchment near Carnarvon with outlying population near Wiluna. It is often found situated in low-lying area, along creeklines or on rocky ground growing in red loamy soils and is commonly associated with Acacia sclerosperma and Acacia tetragonophylla and sometimes with Acacia ancistrocarpa.