is a specific kind of: dicot genus, magnoliopsid genus.

has as a member: China fleece vine, Polygonum aubertii, Russian vine, silver lace vine | buckwheat, Fagopyrum esculentum, Polygonum fagopyrum | kiss-me-over-the-garden-gate, Polygonum orientale, prince's-feather, prince's-plume, princess feather.

is a member of: buckwheat family, family Polygonaceae, Polygonaceae.