''Joannesia'' is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of plants in the
family
Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...
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 ...
, first described as a genus in 1798. The entire genus is
endemic
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
to
Brazil
Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...
.
[Kew World Checklist of Selected Plant Families]
/ref>
Etymology
''Joannesia'' is a taxonomic patronym honoring the king John VI of Portugal
'' Dom'' John VI (; 13 May 1767 – 10 March 1826), known as "the Clement" (), was King of the United Kingdom of Portugal, Brazil and the Algarves from 1816 to 1825, and after the recognition of Brazil's independence, titular Emperor of Brazil ...
.
Systematics
;Species[
# '' Joannesia heveoides'' Ducke - Amazonas State in Brazil
# '' Joannesia princeps'' Vell. - eastern Brazil (]Distrito Federal
A federal district is a specific administrative division in one of various federations. These districts may be under the direct jurisdiction of a federation's national government, as in the case of federal territory (e.g., India, Malaysia), or th ...
, Espírito Santo
Espírito Santo (; ) is a state in southeastern Brazil. Its capital is Vitória, and its largest city is Serra. With an extensive coastline, the state hosts some of the country's main ports, and its beaches are significant tourist attracti ...
, Minas Gerais
Minas Gerais () is one of the 27 federative units of Brazil, being the fourth largest state by area and the second largest in number of inhabitants with a population of 20,539,989 according to the 2022 Brazilian census, 2022 census. Located in ...
, Rio de Janeiro
Rio de Janeiro, or simply Rio, is the capital of the Rio de Janeiro (state), state of Rio de Janeiro. It is the List of cities in Brazil by population, second-most-populous city in Brazil (after São Paulo) and the Largest cities in the America ...
)
;Species in homonymic genus
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:
*''Joannesia insignis'' Pers. - ''Chuquiraga jussieui
''Chuquiraga jussieui'', the flower of the Andes, is a species of flowering plant in the family Asteraceae. It is a low shrub, reaching a height of about 75 cm. ''Chuquiraga jussieui'' is an endangered flower. Flowers are pale yellow or oran ...
'' J.F.Gmel.The Plant List, synonym list for ''Chuquiraga jussieui'' J.F.Gmel.
/ref>
References
Euphorbiaceae genera
Jatropheae
Endemic flora of Brazil
Taxa named by José Mariano de Conceição Vellozo
{{Euphorbiaceae-stub