''Polystemma'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

flowering plant Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. They include all forbs (flowering plants without a woody stem), grasses and grass-like plants, a vast majority of ...

s of the family

Apocynaceae Apocynaceae (from ''Apocynum'', Greek for "dog-away") is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly known as the dogbane family, because some taxa were used as dog poison Members of the ...

first described as a genus in 1844. It is native to

Mexico Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guate ...

and

Central America Central America ( es, América Central or ) is a subregion of the Americas. Its boundaries are defined as bordering the United States to the north, Colombia to the south, the Caribbean Sea to the east, and the Pacific Ocean to the west. ...

. ;SpeciesThe Plant List, genus ''Polystemma''
/ref> # ''

Polystemma guatemalense ''Polystemma'' is a genus of flowering plants of the family Apocynaceae first described as a genus in 1844. It is native to Mexico and Central America Central America ( es, América Central or ) is a subregion of the Americas. Its boun ...

'' (Schltr.) W.D.Stevens - from Nayarit to Costa Rica # ''

Polystemma mirandae ''Polystemma'' is a genus of flowering plants of the family Apocynaceae first described as a genus in 1844. It is native to Mexico Mexico ( Spanish: México), officially the United Mexican States, is a country in the southern portion of N ...

'' Lozada-Pérez - Guerrero, Oaxaca, Puebla # ''

Polystemma viridiflora ''Polystemma'' is a genus of flowering plants of the family Apocynaceae first described as a genus in 1844. It is native to Mexico and Central America. ;Species # ''Polystemma guatemalense'' (Schltr.) W.D.Stevens - from Nayarit to Costa Rica # ...

'' Decne. - Michoacán, Veracruz, Oaxaca, Chiapas

References

Apocynaceae genera Asclepiadoideae Taxa named by Joseph Decaisne {{Apocynaceae-stub