The spindly, open shrub or tree typically grows to a height of 1 to 6 metres (3.3 to 19.7 ft) and has one or two stems at the base.[1] The green phyllodes have a linear to narrowly elliptic shape with a length of 2.5 to 6 cm (0.98 to 2.36 in) and a width of 3 to 6 mm (0.12 to 0.24 in).[2] It produces yellow flowers from May to August.[1] After flowering it forms immature pods with a width of 7 to 8 mm (0.28 to 0.31 in) with oblique seeds.[2]
Acacia jensenii is closely related to Acacia dictyophleba and Acacia sabulosa. It was first formally described by Joseph Maiden in 1917 as a part of Alfred James Ewart and Olive Blanche Davies's work Appendix IV: Acacias of the Northern Territory. The Flora of the Northern Territory. It was reclassified as Racosperma jensenii in 2003 by Leslie Pedley and transferred back into genus Acacia in 2006. The only other synonym is Acacia jenseni.[3]
