About Acacia simsii A.Cunn. ex Benth.
Acacia simsii A.Cunn. ex Benth. is a smooth shrub that grows 1 to 4 metres tall. Its phyllodes are shaped linear to narrowly elliptic, and are straight or sometimes incurved, measuring 5–14 cm long and 2–7 mm wide. The phyllodes have pointed tips, a leathery texture, 3 or 4 main longitudinal nerves, and a small number of minor longitudinal nerves between the main ones. A gland is located 0–2 mm above the pulvinus, and up to five additional glands are found along the adaxial margin.
Inflorescences typically grow as clusters of heads in leaf axils, borne on 5–12 mm long peduncles. The bracts at the base of the flowers are persistent. The flower heads are globular, 3.5–4 mm in diameter, and hold 25 to 35 golden flowers. Each flower has five parts, with sepals that are either free or joined for up to two-thirds of their length.
The pods are leathery, smooth, linear, and flat but raised over the contained seeds, reaching up to 8 cm long and 4–7 mm wide. The seeds are dull brown-black, arranged longitudinally, and shaped from almost circular to broadly elliptic. They are 2.5 to 4 mm long, and have a clublike aril.
This species is most commonly found growing on gently undulating terrain, in sand and gravel within open eucalypt forest and woodland. It sometimes occurs in closed heath, and may form closed scrub in disturbed areas. It is closely related to Acacia multisiliqua, which generally has shorter phyllodes, with the lowest gland typically positioned further from the pulvinus, a shorter peduncle, and larger seeds with a different shape.
