''Ceratopetalum'' is a genus of nine species of

shrub A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees ...

and

tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...

in the family

Cunoniaceae Cunoniaceae is a family of 27 Genus, genera and about 335 species of woody plants in the order Oxalidales, mostly found in the tropical and wet temperate regions of the Southern Hemisphere. The greatest diversity of genera are in Australia and Ta ...

. They are found along the eastern coast of

Australia Australia, officially the Commonwealth of Australia, is a Sovereign state, sovereign country comprising the mainland of the Australia (continent), Australian continent, the island of Tasmania, and numerous List of islands of Australia, sma ...

and extend north to

New Guinea New Guinea (; Hiri Motu Hiri Motu, also known as Police Motu, Pidgin Motu, or just Hiri, is a language of Papua New Guinea, which is spoken in surrounding areas of Port Moresby (Capital of Papua New Guinea). It is a simplified version of ...

. Two Australian species are among the best known, one being '' C. apetalum'' or coachwood, renowned as a timber tree, and ''C. gummiferum'', the

New South Wales ) , nickname = , image_map = New South Wales in Australia.svg , map_caption = Location of New South Wales in AustraliaCoordinates: , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , es ...

Christmas Christmas is an annual festival commemorating Nativity of Jesus, the birth of Jesus, Jesus Christ, observed primarily on December 25 as a religious and cultural celebration among billions of people Observance of Christmas by country, around t ...

bush. Both New South Wales Christmas bush (''C. gummiferum'') and coachwood (''C. apetalum'') are widespread from south-east

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ ...

to the south coast of

, whereas the other extant Australian species are largely confined to high-altitude montane habitats in north-east

. These restricted distributions have been hypothesised to be refugia from cycles of changing climate during the

Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...

Species

*''

Ceratopetalum apetalum ''Ceratopetalum apetalum'', the coachwood, scented satinwood or tarwood, is a medium-sized hardwood tree, straight-growing with smooth, fragrant, greyish bark. It is native to eastern Australia in the central and northern coastal rainforests ...

'' D.Don (Coachwood) *''

Ceratopetalum corymbosum ''Ceratopetalum'' is a genus of nine species of shrub and tree in the family Cunoniaceae. They are found along the eastern coast of Australia and extend north to New Guinea. Two Australian species are among the best known, one being '' C. apetal ...

'' C.T.White *''

Ceratopetalum gummiferum ''Ceratopetalum gummiferum'', the New South Wales Christmas bush, is a tall shrub or small tree popular in Plant cultivation, cultivation due to its sepals that turn bright red-pink at around Christmas time. The petals are actually small and whi ...

'' Sm. (NSW Christmas bush) *''

Ceratopetalum hylandii ''Ceratopetalum'' is a genus of nine species of shrub and tree in the family Cunoniaceae. They are found along the eastern coast of Australia and extend north to New Guinea. Two Australian species are among the best known, one being '' C. apetal ...

'' Rozefelds & R.W.Barnes *''

Ceratopetalum iugumensis ''Ceratopetalum'' is a genus of nine species of shrub and tree in the family Cunoniaceae. They are found along the eastern coast of Australia and extend north to New Guinea. Two Australian species are among the best known, one being '' C. apetal ...

'' Rozefelds & R.W.Barnes *''

Ceratopetalum macrophyllum ''Ceratopetalum'' is a genus of nine species of shrub and tree in the family Cunoniaceae. They are found along the eastern coast of Australia and extend north to New Guinea. Two Australian species are among the best known, one being '' C. apetal ...

'' Hoogland *''

Ceratopetalum succirubrum ''Ceratopetalum succirubrum'' is a species of plant in the family Cunoniaceae. It is found in Australia, West Papua (Indonesia), and Papua New Guinea. It is threatened by habitat loss. First collected by botanists at Gadgarra on the Atherton Ta ...

'' C.T.White *''

Ceratopetalum tetrapterum ''Ceratopetalum'' is a genus of nine species of shrub and tree in the family Cunoniaceae. They are found along the eastern coast of Australia and extend north to New Guinea. Two Australian species are among the best known, one being '' C. apetal ...

'' Mattf. *''

Ceratopetalum virchowii ''Ceratopetalum'' is a genus of nine species of shrub and tree in the family Cunoniaceae. They are found along the eastern coast of Australia and extend north to New Guinea. Two Australian species are among the best known, one being '' C. apetal ...

'' F.Muell. *†''

Ceratopetalum suciensis ''Ceratopetalum'' is a genus of nine species of shrub and tree in the family Cunoniaceae. They are found along the eastern coast of Australia and extend north to New Guinea. Two Australian species are among the best known, one being ''Ceratopeta ...

'' (

Campanian The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian s ...

)

Fossil evidence

Fossil evidence for ''Ceratopetalum'' species has been found in

Eocene The Eocene ( ) Epoch is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (mya). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene' ...

deposits in

South Australia South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories ...

.Barnes RW, Hill RS.''Ceratopetalum'' fruits from Australian cainozoic sediments and their significance for petal evolution in the genus. ''Australian Systematic Botany'' 12(5) 635 - 645. Named fossil species include ''Ceratopetalum maslinensis'' and ''Ceratopetalum westermannii''.

References

Oxalidales genera {{Oxalidales-stub