The flower stem is green, simple or multi-branched, 3–45 cm (1.2–17.7 in) long and similar length or longer than the leaves, bracts brown or green, flexible, smooth, dry and thin.

The perianth is yellow on the inside and outside of the tube, hairy, 5–12 mm (0.20–0.47 in) long, lobes whitish inside, 3–9 mm (0.12–0.35 in) long, stamen upright, and borne in dense, terminal clusters.

[2][3][4] Conostylis aculeata was first formally described in 1810 by botanist Robert Brown and the description was published in Prodromus Florae Novae Hollandiae.

[7] This conostylis is a widespread species from the Zuytdorp National Park to Augusta and Albany and stretching inland to Cowcowing and Narembeen.

[3] The following is a list of subspecies of C. aculeata accepted by the Australian Plant Census as of October 2023:[1]