Melaleuca biconvexa is a tree or shrub in the myrtle family, Myrtaceae and is endemic to coastal areas of New South Wales.

The leaves have a distinctive, wing-like shape and the flowers are in white or cream-coloured heads at the ends of its branches.

The leaves are distinctive in having the mid-vein in a groove with either side of the leaf blade curving up wing-like from this vein.

[3] This melaleuca occurs in scattered populations in coastal areas from Port Macquarie to Jervis Bay.

[2][3][4] Melaleuca biconvexa is able to resprout after fire but faces a number of threats to its survival including land clearing, alteration of drainage patterns and swamp reclamation, grazing and trampling by stock and competition from noxious aquatic weeds such as Sagittaria platyphylla.