convolvulus (L.) Á.Löve (syns Polygonum convolvulus, Bilderdykia convolvulus) – black-bindweed; Europe, Asia, northern Africa. Fallopia cristata (Engelm. ex A.Gray) Holub – eastern and central United States Fallopia cynanchoides (Hemsl.) Haraldson (syn. Polygonum cynanchoides) – western China Fallopia dentatoalata (F.Schmidt) Holub (syn. Polygonum dentatoalatum) – Eastern Asia Fallopia dumetorum (L.) Holub (syns Polygonum dumetorum, Bilderdykia dumetorum) – copse bindweed, small-flower knotweed; Europe, Asia, northern Africa Fallopia filipes (H.Hara) Holub – Nepal Fallopia koreana B.U.Oh & J.G.Kim – Korean knotweed; Korea Fallopia pterocarpa (Meisn.) Holub (syn. Polygonum pterocarpum) – Southern Asia Fallopia scandens (L.) Holub (syns Polygonum scandens, Reynoutria scandens) – climbing false buckwheat; North America Fallopia schischkinii Tzvelev – Russian Far East Former species Many species at one time placed in Fallopia have been moved to other genera in the subfamily Polygonoideae. Some synonyms are listed below. Fallopia × bohemica → Reynoutria × bohemica, Bohemian knotweed. Fallopia ciliinodis (Michx.) Holub – fringed black bindweed → Polygonum ciliinode Fallopia denticulata (C.C.Huang) Holub → Pteroxygonum denticulatum Fallopia japonica Houtt. – Japanese knotweed → Reynoutria japonica Fallopia sachalinensis – giant knotweed → Reynoutria sachalinensis Hybrids Crosses between Japanese knotweed and giant knotweed have occurred where the two species grow in close proximity. The hybrid, ×Reyllopia conollyana (Reynoutria japonica × Fallopia baldschuanica) is called railway-yard knotweed. Distribution Fallopia species are native to much of the Northern Hemisphere, including most of Eurasia, North Africa and central and eastern North America. They have been widely introduced elsewhere including eastern and southern Africa, eastern North America, including Mexico, and parts of South America. Ecology Fallopia species are used as food plants by the larvae of some Lepidoptera species including Coleophora therinella (recorded on F. convolvulus). References External links Polygonaceae genera