In an overgrown field, we'll find an abundance of pokeweed, superb boiled in 2 changes of water but poisonous raw. It's especially good seasoned with soy sauce, plus garlic lightly browned in olive oil.
Later, we'll find vast stands of burdock, a despised "weed" with an edible and medicinal root. This time, we'll also find the immature flower stalks in season. Parboiled and peeled, they taste like artichoke hearts.
After lunch, we'll find spicy field pennycress, another member of the mustard family, growing near corn-flavored chickweed. Not far off, we'll find spinach-flavored lamb's-quarters. And we'll have our last chance of the season to find sour curly (yellow) dock leaves and stems before they become unpalatably bitter.