Atrema

Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Campanulids
Ordo: Apiales

Familia: Apiaceae
Subfamilia: Apioideae
Tribus: Oenantheae
Genus: Atrema
Species: A. americanum – A. testiculatum
Name

Atrema DC. Coll. Mém. 5: 71–72, pl. 18. (1829)

Type species: Non designatus

Note: Downie (et al.) (2008) provide evidence for separating both these two North American species from the Old World Bifora (Coriandreae].
References

Candolle, A.P. de 1829. Collection de mémoires 5: 71–72, pl. 18.
Downie, S.R., Katz-Downie, D.S., Sun, F-J. & Lee, C.S. 2008. Phylogeny and biogeography of Apiaceae tribe Oenantheae inferred from nuclear rDNA ITS and cpDNA psbI–5′trnK(UUU) sequences, with emphasis on the North American Endemics clade. Botany 86(9): 1039–1064. DOI: 10.1139/B08-055 PDF Reference page.
Hassler, M. 2018. Atrema. World Plants: Synonymic Checklists of the Vascular Plants of the World In: Roskovh, Y., Abucay, L., Orrell, T., Nicolson, D., Bailly, N., Kirk, P., Bourgoin, T., DeWalt, R.E., Decock, W., De Wever, A., Nieukerken, E. van, Zarucchi, J. & Penev, L., eds. 2018. Species 2000 & ITIS Catalogue of Life. Published on the internet. Accessed: 2018 Aug. 25. Reference page.
Tropicos.org 2014. Atrema. Missouri Botanical Garden. Published on the internet. Accessed: 2014 Apr. 18.