The name 'cajeput tree' is primarily used for the species M. cajuputi, M. leucadendra, M. linariifolia, M. viridiflora and M. quinquenervia.
Similar subtropical trees from the eucalyptus family are evergreens with pointed leaves and white, red or green flowers.
Melaleuca quinquenervia is considered an invasive species in swampy areas of Florida.
[1] It was introduced into the United States both as an ornamental tree and to control erosion in swamps.
[2] The various parts of the cajeput tree, specifically Melaleuca leucadendra, have many known uses.