Pteroxygonum

"Pteroxygonum" is a Polygonaceae genus, related to Fallopia. A few species of the latter have been merged on it, such as F.denticulata.
Species.
P denticulatum (C.C.Huang)TM Schust et Reveal (bas.Polygonum denticulatum)
P giraldii Dammer et Diels (syn. Fagopyrum giraldii K.Haralson)