Hypocalymma scariosum is a species of flowering in the myrtle family Myrtaceae, and is endemic to the south of Western Australia.

It is an erect, apparently short-lived, glabrous shrublet, with grooved linear leaves, and cream-coloured or sometimes yellow flowers with 12 to 20 stamens.

Hypocalymma scariosum is an erect, apparently short-lived shrublet that typically grows to a height of 15–40 cm (5.9–15.7 in).

[2][3][4] Hypocalymma scariosum was first formally described in 1844 by Johannes Conrad Schauer in Lehmann's Plantae Preissianae.

[7] This species of Hypocalymma is found in swamps, often in Jarrah woodland or Myrtaceae-rich shrubland from the Scott River plain to Lake Jasper and between Walpole and the Two Peoples Bay Nature Reserve in the Jarrah Forest and Warren bioregions of southern Western Australia.