Hypocalymma myrtifolium is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to a restricted area in the south west of Western Australia.

It is an erect shrub with egg-shaped to elliptic leaves and white or cream-coloured flowers with 30 to 50 stamens in several rows.

Hypocalymma myrtifolium is an erect, often multistemmed shrub that typically grows to a height of 30–50 cm (12–20 in) and has winged stems.

[7] This species of Hypocalymma grows amongst rocks on the middle and upper slopes of the Bluff Knoll plateau in the Stirling Range in the south-west of Western Australia.

[3] Hypocalymma myrtifolium is listed as "Priority Two" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[3] meaning that it is poorly known and from one or a few locations.