Rumex crispus — the tart, lemony wild green that came up free in fence rows and old fields every spring. A sharecropper's first fresh vegetable after a long winter of dried beans and cornmeal.
Curly dock was survival knowledge passed grandmother to grandchild — one of the wild greens that filled the hungry gap between winter stores running out and the garden coming in. Knowing which fence-row plant was food and which was poison was a literal life skill on Southern farms where the commissary was the only store and credit ran out before spring.
The young leaves are exceptionally rich in vitamin A and vitamin C — a critical spring tonic in the months before garden crops came in. The root has a long ethnobotanical record as a gentle blood purifier and laxative (the same anthraquinone chemistry as yellow dock root). High iron content made it a folk anemia remedy, especially for women. The sour taste comes from oxalic acid, which also signals its vitamin C density.
Gather only young, tender spring leaves before the central stalk shoots up — older leaves turn bitter and tough. Boil in one change of water to reduce oxalic acid, then dress with vinegar, fatback, or a little bacon grease as you would any pot of greens. The natural tartness means it needs less added acid than collards.
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