Prostanthera tysoniana is a species of flowering plant in the family Lamiaceae and is endemic to Western Australia.

It is a small, intricately-branched shrub with broadly elliptic leaves arranged in opposite pairs and white or cream-coloured flowers with purple streaks.

Prostanthera tysoniana is a shrub that typically grows to a height of 0.2–0.5 m (7.9 in – 1 ft 7.7 in) and has intricately-branched stems that are square in cross-section.

[2][3] This mintbush was first formally described in 1997 by John Carrick who gave it the name Eichlerago tysoniana in the Journal of the Adelaide Botanic Gardens, from specimens collected by Isaac Tyson near the Murchison River in 1898.

[5][3] Prostanthera tysoniana is classified as "Priority Three" by the Government of Western Australia Department of Parks and Wildlife[3] meaning that it is poorly known and known from only a few locations but is not under imminent threat.