Long leaf Wattle

Acacia longissima is slender shrub or small and spreading tree that typically grows to a height of up to 5 m (16 ft) and usually has glabrous branchlets. Its phyllodes are linear to elliptic, usually straight, 100–200 mm (3.9–7.9 in) long, 1–7 mm (0.039–0.276 in) wide, thin, dark green and glabrous with three to five main longitudinal veins, the central vein most prominent. There are thin, membranous stipules less than 0.5 mm (0.020 in) long at the base of the phyllodes. Flowering usually occurs from January to May. The pods are more or less terete, straight to slightly curved, 90–120 mm (3.5–4.7 in) long, 2–4 mm (0.079–0.157 in) wide and slightly constricted between the seeds. The seeds are narrowly elliptic, 5–6 mm (0.20–0.24 in) long and dull brown with a top-shaped aril.

Narrow-leaf wattle is a near-coastal species that occurs in the Nambour and Nerang districts of south-eastern Queensland with outliers at Gin Gin and Mount Nebo. It also occurs in the Mullumbimby district of far northern coast of New South Wales, extending down the coastal areas to Sydney and the Batemans Bay and Moruya areas on the south coast. It usually grows on the borders of rainforest, sometimes in gullies in wet and dry sclerophyll forest.