Lamb’s Quaters or Goosefoot (Chenopodium Berlandieri):
This little known “weed” (to me at least) is of the same genus (closely related to) as Quinoa. It is part of the Eastern Agricultural Complex, a group of plants the Eastern Woodland Native Americans were foraging for as far back as 6,000 BCE. By 1,800 BCE they were cultivating/domesticating this and other plants.
The young plants are edible as baby greens in early summer, and till mid summer the tips of the plants. The leaves and nutritious seeds are also eaten. Here is some interesting historical information.
Good Weeds # 1 Intro and Filaree.