''Polyosma'' is a genus of about 60 species of trees native to south-east Asia. They occur from
China south through south-east Asia to the east coast of
Australia,
New Guinea
New Guinea (; Hiri Motu: ''Niu Gini''; id, Papua, or , historically ) is the world's second-largest island with an area of . Located in Oceania in the southwestern Pacific Ocean, the island is separated from Australia by the wide Torr ...
, the
Solomon Islands
Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its capit ...
and
New Caledonia.
Its taxonomic placement has long been uncertain: it was traditionally placed in
Grossulariaceae
''Ribes'' is a genus of about 200 known species of flowering plants, most of them native to the temperate regions of the Northern Hemisphere. The various species are known as currants or gooseberries, and some are cultivated for their edible ...
, but in the
APG II system
The APG II system (Angiosperm Phylogeny Group II system) of plant classification is the second, now obsolete, version of a modern, mostly molecular-based, system of plant taxonomy that was published in April 2003 by the Angiosperm Phylogeny Gr ...
it was given its own family, Polyosmaceae, which was unplaced as to order within the
euasterids II
In the APG IV system (2016) for the classification of flowering plants, the name asterids denotes a clade (a monophyletic group). Asterids is the largest group of flowering plants, with more than 80,000 species, about a third of the total floweri ...
(campanulids)
clade. More recent research found Polyosmaceae to be a sister to the
Escalloniaceae
Escalloniaceae is a family of flowering plants consisting of about 130 species in seven genera. In the APG II system it is one of eight families in the euasterids II clade (campanulids) that are unplaced as to order. More recent research has prov ...
, so for simplicity's sake the
Angiosperm Phylogeny Website
The Angiosperm Phylogeny Website (or APweb) is a website dedicated to research on angiosperm phylogeny and taxonomy.
The site is hosted by the Missouri Botanical Garden website and maintained by researchers, Peter F. Stevens and Hilary M. Davis ...
now recommends the latter family be expanded to include this genus.
Species include:
*''
Polyosma alangiacea''
F.Muell. – white alder
*''
Polyosma brachyandrum''
Domin[
*'' Polyosma brachystachys'' Schltr.][
*'' Polyosma cunninghamii'' Benn.][
*'' Polyosma discolor'' Baill.][
*'' Polyosma hirsuta'' C.T.White – Alder][
*'' Polyosma integrifolia'' Blume][
*'' Polyosma kouaouana'' Pillon][
*'' Polyosma leratii'' Guillaumin][
*'' Polyosma pancheriana'' Baill.][
*'' Polyosma podophylla'' Schltr.][
*'' Polyosma reducta'' F.Muell.][
*'' Polyosma rhytophloia'' C.T.White & W.D.Francis][
*'' Polyosma rigidiuscula'' F.Muell. & F.M.Bailey][
*'' Polyosma spicata'' Baill.][
*'' Polyosma subintegrifolia'' (Guillaumin) Pillon][
]
References
Asterid genera
Escalloniaceae
{{asterid-stub