For Polygonum
Brandbyge, J. 1993. Polygonaceae In Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp.
Costea, M., and F.J. Tardif. 2003a. Nomenclatural changes in the genus Polygonum section Polygonum (Polygonaceae). Sida 20: 987-997.
Costea, M., F.J. Tardif, and H.R. Hinds. 2005f. Polygonum. In Flora of North America Editorial Committee. 2005. Flora of North America north of Mexico. Volume 5, Magnoliophyta: Caryophyllidae, part 2. Oxford Univ. Press, New York, NY. 656 pp.
Horton, J.H. 1961. A monograph of Delopyrum Small, Dentoceras Small, Polygonella Michx., and Thysanella Gray (Polygonaceae). Ph.D. dissertation, Univ. of North Carolina at Chapel Hill.
Ronse De Craene, L.P., S.-P. Hong, and E.F. Smets. 2004. What is the taxonomic status of Polygonella? Evidence of floral morphology. Ann. Missouri Bot. Gard. 91: 320-345.
Schuster, T.M., J.L. Reveal, and K.A. Kron. 2011. Phylogeny of Polygoneae (Polygonaceae: Polygonoideae). Taxon 60: 1653-1666.
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