Eucalypt is a descriptive name for woody plants with capsule fruiting bodies belonging to seven closely related genera found across Australasia: Eucalyptus, Corymbia, Angophora, Stockwellia, Allosyncarpia, Eucalyptopsis and Arillastrum.
Myrtaceae or the myrtle family is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All species are woody, contain essential oils, and have flower parts in multiples of four or five. The leaves are evergreen, alternate to mostly opposite, simple, and usually entire. The flowers have a base number of five petals, though in several genera the petals are minute or absent. The stamens are usually very conspicuous, brightly coloured and numerous.
Metrosideros is a genus of approximately 60 trees, shrubs, and vines mostly found in the Pacific region in the family Myrtaceae. Most of the tree forms are small, but some are exceptionally large, the New Zealand species in particular. The name derives from the Ancient Greek metra or "heartwood" and sideron or "iron". Perhaps the best-known species are the pōhutukawa, northern and southern rātā of New Zealand, and ʻōhiʻa lehua, from the Hawaiian Islands.
Lophostemon is a genus of 4 species of evergreen tree in the myrtle family Myrtaceae. All four species are native to Australia, with one extending to New Guinea. The genus was first described in 1830 but not widely recognized until the 1980s. All 4 species were previously included in the related genus Tristania.
Kunzea is a genus of plants in the family Myrtaceae and is endemic to Australasia. They are shrubs, sometimes small trees and usually have small, crowded, rather aromatic leaves. The flowers are similar to those of plants in the genus Leptospermum but differ in having stamens that are longer than the petals. Most kunzeas are endemic to Western Australia but a few occur in eastern Australia and a few are found in New Zealand. The taxonomy of the genus is not settled and is complicated by the existence of a number of hybrids.
Uromyrtus is a genus of plants in the myrtle family Myrtaceae described as a genus in 1941. The greatest diversity of species are found in New Caledonia and the remainder are found in Australia, New Guinea and Borneo.
Asteromyrtus is a genus of flowering plants in the Myrtaceae family. It is closely related to Callistemon and Melaleuca.
Xanthostemon is a genus of trees and shrubs, constituting part of the myrtle plant family Myrtaceae. This genus was first described in 1857 by German–Australian botanist Ferdinand von Mueller. According to different official sources between 46 and 51 species are known to science. They grow naturally in New Caledonia, Australia, the Solomon Islands and Malesia, including the Philippines, New Guinea and Indonesia. The genera Pleurocalyptus and Purpureostemon from New Caledonia are morphologically close to Xanthostemon.
Zygogynum is a genus of plant in family Winteraceae. 19 species are native to New Caledonia, and are pollinated primarily by beetles and moths. Other species are native to New Guinea, the Bismarck Archipelago, the Solomon Islands, Lord Howe Island, and Queensland.
Sannantha is a genus of flowering plants in the family Myrtaceae that are native to Australia and New Caledonia. Plants in the genus Sannantha are shrubs or trees with leaves arranged in opposite pairs, flowers usually arranged in small groups, the peduncles often 1.5–2 times as long as the pedicels and with seven to fourteen stamens. The fruit is a thin-walled capsule containing flattened, D-shaped seeds. Some species of Sannantha were previously included in the genus Babingtonia.
Ristantia is a group of plants in the family Myrtaceae described as a genus in 1982. The entire genus is endemic to the State of Queensland in Australia.
- Ristantia gouldiiPeter G. Wilson & B. Hyland - a tree species listed as vulnerable
- Ristantia pachysperma(F.Muell. & F.M.Bailey) Peter G.Wilson & J.T.Waterh.
- Ristantia waterhouseiPeter G.Wilson & B.Hyland
Gossia is a genus of rainforest trees in the myrtle family first described as a genus in 2003. It is native to northeastern Australia as well as several islands of Papuasia and New Caledonia.
Kardomia is a genus of flowering plants in the family Myrtaceae. The genus was first formally described in 2007 and includes species previously included in Baeckea and Babingtonia. The entire genus is native to northeastern Australia
- Kardomia granitica(A.R.Bean) Peter G.Wilson
- Kardomia jucunda(S.T.Blake) Peter G.Wilson
- Kardomia odontocalyx(A.R.Bean) Peter G.Wilson
- Kardomia prominens(A.R.Bean) Peter G.Wilson
- Kardomia silvestris(A.R.Bean) Peter G.Wilson
- Kardomia squarrulosa(Domin) Peter G.Wilson
Metrosideros nervulosa, commonly known as the mountain rose, is a species of flowering plant in the family Myrtaceae. It is endemic to Lord Howe Island in the Tasman Sea, part of the Australian state of New South Wales. It occurs in shrubland or low forest, mainly at altitudes of 300–875 m on the main peaks of the island. It prefers sunny positions on exposed ridges or in the forest canopy.
Mitrantia is a genus of plant in family Myrtaceae described as a genus in 1988. It contains only one known species, Mitrantia bilocularis,endemic to the State of Queensland in northeastern Australia.
Octamyrtus is a group of plants in the myrtle family Myrtaceae described as a genus in 1922. It is native to New Guinea and to the nearby Indonesian Province of Maluku.
- Octamyrtus arfakensisKaneh. & Hatus. ex C.T.White - West New Guinea
- Octamyrtus behrmanniiDiels - New Guinea
- Octamyrtus glomerataKaneh. & Hatus. ex C.T.White - New Guinea
- Octamyrtus halmaherensisCraven & Sunarti - Halmahera
- Octamyrtus insignisDiels - New Guinea
- Octamyrtus pleiopetalaDiels - New Guinea, Aru Islands
Sphaerantia is a group of flowering plants in the family Myrtaceae, described as a genus in 1988. The entire genus is endemic to the northern part of the State of Queensland in Australia.
- Sphaerantia chartaceaPeter G.Wilson & B.Hyland
- Sphaerantia discolorPeter G.Wilson & B.Hyland
Welchiodendron is a genus of plant in family Myrtaceae described as a genus in 1982. It contains only one known species, Welchiodendron longivalve, native to New Guinea and northern Queensland.
Metrosideros leunigii is the oldest described fossil species of the flowering plant genus Metrosideros, named from fossil flowers and fruits uncovered from the Oligocene aged Little Rapid River deposit in Tasmania, Australia, as well as leaves from this deposit and identical leaves from the Eocene aged Hasties deposit, also in Tasmania. These fossils are significant, because they show that Metrosideros once occurred naturally in Australia during the Cenozoic, and has since become extinct.
Fergusonina, the sole genus in the family of Fergusoninidae, are gall-forming flies. There are about 40 species in the genus, all of them producing galls on Eucalyptus, Melaleuca, Corymbia, and Metrosideros species in Australia and New Zealand.
