For Onagraceae
Crisci, J.V., E.A. Zimmer, P.C. Hoch, G.B. Johnson, C. Mudd, and N.S. Pan. 1990. Phylogenetic implications of ribosomal DNA restriction site variation in the plant family Onagraceae. Ann. Mo. Bot. Gard. 77: 523-538.
Munz, P.A. 1965. Onagraceae. N. Amer. Fl. II. 5: 1-278.
Wagner, W.L., and P.C. Hoch 2021. Onagraceae. 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.
Wagner, W.L., P.C. Hoch, and P.H. Raven. 2007. Revised classification of the Onagraceae. Syst. Bot. Monographs 83: 1-240.