''Gereaua'' is a

monotypic In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispec ...

genus of

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. The term "angiosperm" is derived from the Greek words ('container, vessel') and ('seed'), and refers to those plants th ...

s belonging to the family

Sapindaceae The Sapindaceae are a family of flowering plants in the order Sapindales known as the soapberry family. It contains 138 genera and 1858 accepted species. Examples include horse chestnut, maples, ackee and lychee. The Sapindaceae occur in tempera ...

. It only contains one species, ''Gereaua perrieri''. Its native range is

Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...

Description

''Gereaua perrieri'' is a small or medium-sized tree which grows up to 10 meters tall.

Range and habitat

''Gereaua perrieri'' is native to northern and eastern Madagascar, where it is found in Diana, Sava, Analanjirofo, Alaotra-Mangoro, Analamanga, Haute- Matsiatra, Vatovavy-Fitovinany, Atsimo-Atsinanana, and Anosy regions. It grows in humid lowland forests, littoral forests, and subhumid and montane forests. It is typically found on

lateritic Laterite is both a soil and a rock type rich in iron and aluminium and is commonly considered to have formed in hot and wet tropical areas. Nearly all laterites are of rusty-red coloration, because of high iron oxide content. They develop by ...

and sandy soils from 25 to 1356 meters elevation. There are known 19 subpopulations of the species. It has an estmiated

extent of occurrence Extent may refer to: Computing * Extent (file systems), a contiguous region of computer storage medium reserved for a file * Extent File System, a discontinued file system implementation named after the contiguous region * Extent, a chunk of st ...

(EOO) of 165,756 km². The species is subject to

habitat loss Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...

from shifting cultivation, and its population is thought to be decreasing. There is little information on the species' population size, but it is not considered threatened. Its conservation status is assessed as

least concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

Naming

The genus name is in honour of

Roy Emile Gereau Roy Emile Gereau (born 1947) is an American botanist and explorer. Career Educated at the University of Iowa and Michigan Technological University he graduated BA 1969 and taught at Michigan Technological University and Michigan State Unive ...

(b. 1947), an American botanist and explorer. The specific Latin

epithet An epithet (, ), also byname, is a descriptive term (word or phrase) known for accompanying or occurring in place of a name and having entered common usage. It has various shades of meaning when applied to seemingly real or fictitious people, di ...

of ''perrieri'' is in honour of

Joseph Marie Henry Alfred Perrier de la Bâthie Joseph Marie Henry Alfred Perrier de la Bâthie (11 August 1873 – 2 October 1958) was a French botanist who specialized in the plants of Madagascar. He is the nephew of Eugène Pierre Perrier de la Bâthie, (1825-1916), another botanist, who als ...

(1873–1958), a French botanist who studied Madagascan plants. It was first described and published in Syst. Bot. Vol.35 on page 178 in 2010.

References

{{Taxonbar, from1=Q15961788, from2=Q15525157 Sapindaceae Monotypic Sapindaceae genera Endemic flora of Madagascar Flora of the Madagascar lowland forests Flora of the Madagascar subhumid forests Plants described in 1969