Hypocalymma jessicae, commonly known as Barrens myrtle,[2] is a species of flowering plant in the myrtle family Myrtaceae, and is endemic to the south west of Western Australia.

It is an erect, spreading shrub, with narrowly egg-shaped leaves with the narrower end towards the base, and pale to bright pink flowers mostly arranged in pairs in leaf axils, with 35 to 100 stamens in several rows.

Both sides of the leaves are the same shade of green and there are 2 main rows of oil glands on the lower surface.

[2][3][4][5] Hypocalymma jessicae was first formally described in 2003 by Arne Strid and Gregory John Keighery in the Nordic Journal of Botany from specimens collected on the south-east side of East Mount Barren by Arne Strid in 1983.

[5] This species of Hypocalymma grows in shallow sand on rocky outcrops in the Ravensthorpe Range and Fitzgerald River National Park in the Esperance Plains bioregion of south-western Western Australia.