''Gironniera'', is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

deciduous In the fields of horticulture and Botany, the term ''deciduous'' () means "falling off at maturity" and "tending to fall off", in reference to trees and shrubs that seasonally shed leaves, usually in the autumn; to the shedding of petals, aft ...

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 ...

s, containing six recognized

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

. It is widespread in tropical countries.

Species

*'' Gironniera celtidifolia'' Gaudich. *'' Gironniera hirta'' Ridl. *'' Gironniera nervosa'' Planch. *'' Gironniera parvifolia'' Planch. *'' Gironniera rhamnifolia'' Blume *'' Gironniera subaequalis'' Planch.

Fossil record

†''Gironniera carinata''

fossil A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved ...

seeds of the

Chattian The Chattian is, in the geologic timescale, the younger of two ages or upper of two stages of the Oligocene Epoch/Series. It spans the time between . The Chattian is preceded by the Rupelian and is followed by the Aquitanian (the lowest stage ...

stage,

Oligocene The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the ...

, are known from the

Oberleichtersbach Oberleichtersbach is a municipality in the district of Bad Kissingen in Bavaria in Germany. Divisions of the municipality The municipality includes the following towns: *Oberleichtersbach *Unterleichtersbach *Modlos *Breitenbach *Mitgenfeld Hist ...

Formation in the

Rhön Mountains The Rhön Mountains () are a group of low mountains (or ''Mittelgebirge'') in central Germany, located around the border area where the states of Hesse, Bavaria and Thuringia come together. These mountains, which are at the extreme southeast end o ...

, central

Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...

.The floral change in the tertiary of the Rhön mountains (Germany) by Dieter Hans Mai - Acta Paleobotanica 47(1): 135-143, 2007.

References

* http://www.theplantlist.org/browse/A/Cannabaceae/Gironniera/ * http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=113576 {{Taxonbar, from=Q8964154 Cannabaceae Rosales genera