References

For Circaea

Averett, J.E., and D.E. Boufford. 1985. The flavonoids and flavonoid systematics of Circaea (Circaeeae, Onagraceae). Systematic Bot. 10: 363-373. Google Scholar

Boufford, D.E. 1982 [1983]. The systematics and evolution of Circaea (Onagraceae). Ann Mo. Bot. Gard. 69: 804-994. Google Scholar

Boufford, D.E. 2005. Circaea lutetiana sensu lato (Onagraceae) reconsidered. Harvard Papers in Botany 9: 255-256. Google Scholar

Boufford, D.E. 2021b. Circaea. In Flora of North America Editorial Committee. 2021. Flora of North America north of Mexico. Volume 10, Magnoliophyta: Proteaceae to Elaeagnaceae. Oxford Univ. Press, New York, NY. 456 pp. Google Scholar

Munz, P.A. 1965. Onagraceae. N. Amer. Fl. II. 5: 1-278. Google Scholar

Skvortsov, A.K. 1979. Taxonomy and distribution of Circaea (Onagraceae) in the U.S.S.R. Ann Mo. Bot. Club 66: 880-892. Google Scholar

Wagner, W.L., P.C. Hoch, and P.H. Raven. 2007. Revised classification of the Onagraceae. Syst. Bot. Monographs 83: 1-240. Google Scholar

Xie, L., W.L. Wagner, R.H. Ree, P.E. Berry, and J. Wen. 2009. Molecular phylogeny, divergence time estimates, and historical biogeography of Circaea (Onagraceae) in the Northern Hemisphere. Molec. Phylogen. Evol. 53(3): 995-1009. Google Scholar