It is a spreading shrub with linear leaves that are round in cross-section, and bright pink flowers, with 35 to 55 stamens in several rows.

[3][2][4] Hypocalymma melaleucoides was first formally described in 2003 by Arne Strid and Gregory John Keighery from an unpublished description by Charles Gardner, in the Nordic Journal of Botany from a specimen collected 1 km (0.62 mi) south of Quoin Head in the Fitzgerald River National Park.

[5] The specific epithet (melaleucoides) means 'Melaleuca-like', referring to the leaf-covered branches, superficially resembling some species of Melaleuca.

[4] Fitzgerald myrtle grows in heath on coastal slopes and headlands, and is known from a few collections in the Fitzgerald River National Park in the south of Western Australia, where it grows in sandy to loamy soils over quartzite.

[2][4] Hypocalymma melaleucoides is listed as "Priority Two" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[2] meaning that it is poorly known and from one or a few locations.