Fagopyrum densovillosum J.L.Liu var.pterocarpum J.L.Liu et X.J.Li,a new variety of the Polygonaceae from Sichuan,China,is described and illustrated.It is different to Fagopyrum densovillosum J.L.Liu by its major achenes,2.5～3 mm long and (2～) 2.5～3 mm in diameter,winged on the angular,wings 0.5～1 mm wide,stamens longer than pistils.In addition,the new variety is also different to Fagopyrum gracilipes (Hemsl.) Damm.et Diels var.odontopterum (Gross) Sam by its densely pubescent or villose plants,thicker and red-brown stems and branches,dense nodes,rugulose and small pustulate leaf blade on the surface,stamens longer than pistils.