Hypocalymma tetrapterum, commonly known as papillose myrtle,[2] is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the a restricted area in the south-west of Western Australia.

It is a shrub, with narrowly egg-shaped leaves with the narrower end towards the base, and white yellow flowers with 20 to 35 stamens in several rows.

The lower side of the leaves is convex with many oil glands, surrounded by a circle of small blisters.

[2][3][4] Hypocalymma tetrapterum was first formally described in 1862 by Nikolai Turczaninow in the Bulletin de la Société impériale des naturalistes de Moscou.

[7] This species of Hypocalymma grows in sand or heavier soils, often in woodland, mainly between Eneabba and Badgingarra in the Geraldton Sandplains and Swan Coastal Plain bioregions of south-western Western Australia.