''Bartonia'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

of the

gentian family Gentianaceae is a family of flowering plants of 103 genera and about 1600 species. Etymology The family takes its name from the genus ''Gentiana'', named after the Illyrian king Gentius. Distribution Distribution is cosmopolitan. Characteristi ...

, tribe Gentianeae, subtribe Swertiinae. Members of this genus are called screwstems. ''Bartonia'' was also the name of a genus in the

Loasaceae Loasaceae is a family of 15–20 genera and about 200–260 species of flowering plants in the order Cornales, native to the Americas and Africa. Members of the family include annual, biennial and perennial herbaceous plants, and a few shrubs ...

family, but those species are now generally classified under the genus ''

Mentzelia ''Mentzelia'' is a genus of about 60-70 species of flowering plants in the family (biology), family Loasaceae, native to the Americas. The genus comprises annual plant, annual, biennial plant, biennial, and perennial plant, perennial herbaceous ...

''. ,

Kew Kew () is a district in the London Borough of Richmond upon Thames. Its population at the 2011 census was 11,436. Kew is the location of the Royal Botanic Gardens ("Kew Gardens"), now a World Heritage Site, which includes Kew Palace. Kew is a ...

Plants of the World Online Plants of the World Online (POWO) is an online database published by the Royal Botanic Gardens, Kew. It was launched in March 2017 with the ultimate aim being "to enable users to access information on all the world's known seed-bearing plants by ...

accepts three species of ''Bartonia'': *'' Bartonia paniculata'' *'' Bartonia verna'' *'' Bartonia virginica''

References

Gentianaceae Gentianaceae genera Taxa named by Gotthilf Heinrich Ernst Muhlenberg {{Gentianales-stub