Joannesia
| Joannesia | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Rosids |
| Order: | Malpighiales |
| Family: | Euphorbiaceae |
| Subfamily: | Crotonoideae |
| Tribe: | Jatropheae |
| Genus: |
Joannesia Vell. 1798 not Pers. 1807 (Asteraceae) |
| Synonyms | |
Joannesia is a genus of plants in the family Euphorbiaceae, first described as a genus in 1798. The entire genus is endemic to Brazil.
In 1807, Persoon used the same name, Joannesia, to a very different plant. He thus created an illegitimate homonym, contrary to the rules of nomenclature. So the one species name that he had created in this illegitimate genus had to be renamed, as follows:
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