Acacia nyssophylla, commonly known as pin bush, wait a while and spine bush,[1] is a shrub of the genus Acacia and the subgenus Plurinerves that is endemic to a large area of central and south-western and southern Australia.

The intricate prickly shrub typically grows to a height of 0.5 to 3 metres (2 to 10 ft)[2] and has hairless branchlets that are scarred where the phyllodes have detached.

[1] It blooms from July to October[2] or as late as November producing simple inflorescences that usually appear in pairs in the axils with spherical to ellipsoidal flower-heads that have a diameter of 3.5 to 6 mm (0.14 to 0.24 in) and contain 12 to 19 golden coloured flowers.

The glossy black seeds inside have a lanceolate-oblong or oblong-elliptic shape with a length of 4 to 5 mm (0.16 to 0.20 in) with a large orange or yellow coloured aril.

[1] It was first described by Ferdinand von Mueller in 1863 from a specimen collected by Babbage near Lake Gairdner in South Australia.