The Plant List shows F acutatum as the accepted name and F cymosum as the synonym giving Lehm Mansf ex Hammer in Schultze Motel Verzeichnis Kultpflz ed 2 1986 as the reference It also lists F dibotrys as a synonym Thus the Wikipedia entry should stand here as F acutatum Nevertheless current taxonomists continue to use F cymosum exclusively and there is a lot of work in progress Therefore I make some notes here for future reference should more information become available I am not arguing for a change at this time Shultze Motel J et al 1989 Taxonomy and evolution of cultivated plants Literature review 1987 1988 Die Kulturpflanze 37 453 496 Includes Polygonaceae Fagopyrum MILL Fagopyrum esculentum derived from F cymosum by divergent evolution KOVALENKO 1986 That is inconsistent with the same author in 1986 which is the authority cited by The Plant List The International Organization for Plant Information Provisional Global Plant Checklist does not list the species under either name Kew does not list Fagopyrum at all I can t access Flora of China 2003 See chapter by Li Hong There is an English edition of Mansfeld Schultze which is the official author for F acutatum Mansfeld s Encyclopedia of Agricultural and Horticultural Crops By Peter Hanelt GenBank uses exclusively F cymosum but the deposited sequences are from Ohnishi s lab The species is referred to a F cymosum in Mei Liang Zhou Qian Zhang Ya Di Zheng Yu Tang Fa Liang Li Xue Mei Zhu and Ji Rong Shao 2015 Fagopyrum hailuogouense Polygonaceae One New Species from Sichuan China Novon A Journal for Botanical Nomenclature 24 2 222 224 Note that Novon is published by MBG as is Flora of China They refer to the Li Hong 2003 paper as stating the perennial F cymosum Trevir Meisn which has been synonymized to F dibotrys D Don H Hara Li Hong 2003 No mention of F acutatum The taxonomic references in my initial comment are those by Ohnishi s group in the 1990s Senthilkumaran addresses the cultivation status