''Dendrobium'' section ''Rhizobium'' is a section of the genus ''

Dendrobium ''Dendrobium'' is a genus of mostly Epiphyte, epiphytic and Lithophyte, lithophytic orchids in the Family (biology), family Orchidaceae. It is a very large genus, containing more than 1,800 species that are found in diverse habitats throughout m ...

''.

Description

Plants in this section have thick, fleshy to terete leaves produced along a thin and wiry stem. The section was established in 1851 by

John Lindley John Lindley Fellow of the Royal Society, FRS (5 February 1799 – 1 November 1865) was an English botanist, gardener and orchidology, orchidologist. Early years Born in Old Catton, Catton, near Norwich, England, John Lindley was one of four c ...

and

Joseph Paxton Sir Joseph Paxton (3 August 1803 – 8 June 1865) was an English gardener, architect, engineer and Liberal Party (UK), Liberal Member of Parliament. He is best known for designing the Crystal Palace, which was built in Hyde Park, London, Hyde ...

. Species in this section was included in the genus ''Dockrilla'', named after Alick Dockrill,Australian Plants Online. "What is a ''Dockrillia''?"
by authors including David Jones, Mark Clements and Stephan Rauschert for some species formerly included in the genus ''

''. A 2008 paper, based on a study the

molecular phylogenetics Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...

of a wide range of related orchids, concluded that "the splitting of Australasian dendrobiums into various genera by other authors is excessive and unnecessary" moving the species back to the section Rhizobium.

Distribution

Plants from this section are found in

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

New Guinea New Guinea (; Hiri Motu: ''Niu Gini''; , fossilized , also known as Papua or historically ) is the List of islands by area, world's second-largest island, with an area of . Located in Melanesia in the southwestern Pacific Ocean, the island is ...

New Caledonia New Caledonia ( ; ) is a group of islands in the southwest Pacific Ocean, southwest of Vanuatu and east of Australia. Located from Metropolitan France, it forms a Overseas France#Sui generis collectivity, ''sui generis'' collectivity of t ...

and

Vanuatu Vanuatu ( or ; ), officially the Republic of Vanuatu (; ), is an island country in Melanesia located in the South Pacific Ocean. The archipelago, which is of volcanic origin, is east of northern Australia, northeast of New Caledonia, east o ...

Description

Distribution

Species

Natural Hybrids

References