Lophostemon is a small genus of four species of evergreen trees in the family Myrtaceae (the myrtle and clove family), placed in the order Myrtales. All four species are native to Australia, with one — Lophostemon suaveolens — also extending into New Guinea. The genus was first described in 1830 but was not widely recognised until the 1980s; all four species were previously included in the related genus Tristania.
The trees are characterised by their stamens, which are bundled into groups opposite the petals — the name derives from the Greek lophos (crest) and stemon (stamen), alluding to this crested arrangement. Members of the genus bear leaves typically arranged in false whorls near the ends of branchlets, and produce white to cream flowers.
The best-known member of the genus is Lophostemon confertus, the brush box, which is a familiar tree along the east coast of Australia (Queensland and New South Wales). It grows to approximately 30 metres in height and is notable as a widely planted street tree, though its mature size makes it poorly suited to that role in urban environments with overhead power lines. Lophostemon species also serve as larval food plants for certain Lepidoptera, including the moth Aenetus ligniveren.
Etymology
The name Lophostemon derives from the Greek lophos, meaning "crest," and stemon, meaning "stamen," referring to the characteristic crested arrangement of stamens that distinguishes the genus.
Distribution
All four species of Lophostemon are endemic to Australia, with ranges spanning Queensland, New South Wales, the Northern Territory, and Western Australia. Lophostemon suaveolens is the only species that extends beyond Australia, reaching New Guinea.
Taxonomy Notes
The genus was first described in 1830 but remained little recognised until the 1980s. All four species were previously placed in the related genus Tristania (family Myrtaceae). GBIF recognises the genus within the order Myrtales, family Myrtaceae. As of April 2025, Plants of the World Online accepts exactly four species: L. confertus, L. grandiflorus, L. lactifluus, and L. suaveolens.
