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 8 m 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 7 to 13 cm and a width of 4 to 9 mm 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 4 to 8 mm long stalks. The flower-heads are a short cylindrical shape with a length of 6 to 12 mm and densely packed with yellow flowers. The seed pods that form after flowering have a length of 6 to 12 cm with a distinctive groove along each edge. The seeds insode are 5 to 6.5 mm 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.