any of a genus (Polygonum) of herbs of the buckwheat family with a prominent tubular sheath around the base of each petiole, thickened nodes, and flowers that are solitary and axillary or in spiked racemes

http://id.loc.gov/authorities/subjects/sh85104638

“Polygonum.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polygonum. Accessed 16 Aug. 2026.