Micromyrtus hexamera is a species of flowering plant in the myrtle family, Myrtaceae and is endemic to Queensland. It is a shrub with erect or spreading branchlets, overlapping linear leaves, and white flowers arranged singly in leaf axils with 5 stamens in each flower.
Micromyrtus hexamera is a shrub that typically grows up to high and has erect or spreading branchlets. Its leaves are overlapping, linear, long, wide and sessile or on a petiole up to long. The leaves are glabrous, have many oil glands, and the lower surface is keeled. The flowers are wide and arranged singly in leaf axils on a peduncle long, with 2 bracteoles about long at the base, but that fall off as the flowers open. There are 5 semicircular, translucent sepals lobes long, and 5 more or less round white petals in diameter. There are 5 stamens, the filaments about long. Flowering has been recorded in most months, with a peak around September.[1] [2]
This species was first formally described in 1858 by Ferdinand von Mueller who gave it the name Baeckea leptocalyx in his Fragmenta Phytographiae Australiae.[3] In 1867, George Bentham transferred the species to the genus Micromyrtus as M. leptocalyx in his Flora Australiensis.[4] The specific epithet (leptocalyx) means "slender sepals".[5]
This species of micromyrtus grows in deeply weathered sandstone hills in central Queensland, mainly between Springsure and Tambo, but also near Alpha, Mitchell and Morven.