Lysiosepalum aromaticum is a species of flowering plant in the family Malvaceae and is endemic to a small area in the south-west of Western Australia.

Lysiosepalum aromaticum is a thick, bushy shrub that typically grows to a height of up to 75 cm (30 in) and has a strong aromatic or peppery scent.

[2][3][4] Lysiosepalum aromaticum was first formally described in 2001 by Carolyn F. Wilkins in the journal Nuytsia from specimens collected in 1998.

[2] This species of lysiosepalum is found on slopes and in moist areas near granite outcrops in a single population near Highbury in the Avon Wheatbelt IBRA bioregion in the south-west of Western Australia.

[2][3][4] Lysiosepalum aromaticum is listed as "Priority Two" by the Western Australian Government Department of Biodiversity, Conservation and Attractions,[4] meaning that it is poorly known and from only one or a few locations.