If anyone is interested in the genus Polygonum, especially the species found in Bangladesh and India, I suggest that you read several papers by Prof Bidyut K Datta. I am fortunate to co-author most of those papers.
Polygonum minus (Polygonaceae) locally known as kesum is an aromatic plant commonly used in Malay delicacies. The plant is having potential applications due to its high volatile oil constituents in perfumes and powerful antioxidant activity. It has been used traditionally to treat various ailments including dandruff. https://www.sciencedirect.com/science/article/pii/S2221169115302185
Many species in the seven genera of Polygoneae are traditional and popular medicinal herbs. Anthraquinones and stilbenes are characteristic medicinal compounds of Polygoneae, while other useful constituents, such as alkaloids, glycosides, flavonoids, volatile oils, tannins, resins, coumarins, and lignans, have also been isolated from Polygoneae species. Among versatile bioactivities of Polygoneae compounds, their effects on the cardiovascular and nervous systems and their anti-inflammatory, antimicrobial, antiparasitic, insecticidal, anticancer, and antioxidant activities are highlighted. Interspecific hybridization and the following polyploidization play a major role in Polygoneae diversification. Nuclear ITS and chloroplast DNA sequences are retrieved to resolve the interspecific relationship and reassign some taxa to the appropriate genus. Omics study of Polygoneae is at the budding stage, which will revolutionize the sustainable utilization of Polygoneae medicinal resources. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7158354/
Polygonaceae plants have a worldwide distribution, most of which are in the temperate region of the Northern Hemisphere. There are 235 Polygonaceae species and 37 varieties in China. In the tribe Polygoneae of the subfamily Polygonoideae, there are seven genera, namely, Antenoron, Fagopyrum, Fallopia, Koenigia, Polygonum, Pteroxygonum, and Reynoutria. Polygonum is the largest genus of the family Polygonaceae. This chapter summarizes the current knowledge of phytochemistry, bioactivity, phylogeny, and omics of Polygoneae medicinal plants. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7158354/