Should be amaranth.

The horse amaranth belongs to the horse tooth family annual fleshy herbaceous plants, the scientific name of "horse tooth amaranth", the county folk commonly known as "horse bee vegetable", in Shanghai is known as "health care vegetable", is a characteristic wild vegetable. It is a kind of characteristic wild vegetable. Because of its strong vitality, it is also known as "longevity vegetable". Usually creeping, hairless, stems often purple. Leaves opposite, obovate-cuneate. Summer flowering, flowers small, yellow. Fruit conical, cap split. Often born in the garden or wasteland.