Screwstem
(Bartonia)
Description
Bartonia is a genus of the gentian family, tribe Gentianeae, subtribe Swertiinae. Members of this genus are called screwstems. Bartonia was also the name of a genus in the Loasaceae family, but all of those "Bartonia" species are now generally classified under the genus Mentzelia.
Taxonomic tree:
Domain:
Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Order:Gentianales
Family:Gentianaceae
Genus:Bartonia
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