''Athroisma'' is a genus of plants in the family

Asteraceae Asteraceae () is a large family (biology), family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the Order (biology), order Asterales. The number of species in Asteraceae is rivaled only by the Orchi ...

first described as a genus in 1833. It is native to

East Africa East Africa, also known as Eastern Africa or the East of Africa, is a region at the eastern edge of the Africa, African continent, distinguished by its unique geographical, historical, and cultural landscape. Defined in varying scopes, the regi ...

and

Madagascar Madagascar, officially the Republic of Madagascar, is an island country that includes the island of Madagascar and numerous smaller peripheral islands. Lying off the southeastern coast of Africa, it is the world's List of islands by area, f ...

. ; SpeciesThe Plant List, genus ''Athroisma''
/ref> ; species of homonym genus William Griffith in 1854 used the same name for a genus of very different plants, thus creating an illegitimate

homonym In linguistics, homonyms are words which are either; '' homographs''—words that mean different things, but have the same spelling (regardless of pronunciation), or '' homophones''—words that mean different things, but have the same pronunciat ...

. The World Checklist categorizes his name as a synonym of the genus '' Trigonostemon'' in the

Euphorbiaceae Euphorbiaceae (), the spurge family, is a large family of flowering plants. In English, they are also commonly called euphorbias, which is also the name of Euphorbia, the type genus of the family. Most spurges, such as ''Euphorbia paralias'', ar ...

, but makes no mention of the two species names he coined.

The Plant List The Plant List was a list of botanical names of species of plants created by the Royal Botanic Gardens, Kew and the Missouri Botanical Garden and launched in 2010. It was intended to be a comprehensive record of all known names of plant specie ...

does list the species as unresolved, i.e. of unknown application. The two species names areKew World Checklist of Selected Plant Families, genus ''Athroisma'' Griff.
/ref> * ''Athroisma dentatum'' Griff. - Bay of Bengal * ''Athroisma serratum'' Griff. - Tenasserim region of Myanmar

References

Asteraceae genera Athroismeae {{Asteroideae-stub