Miner's lettuce (Claytonia perfoliata) is a small, cool-season salad succulent prized for its round, cup-shaped leaves — each disc pierced clean through the middle by its own stem — and its mild, sweet, faintly earthy spinach-like taste with a cool, juicy crunch. Native to the west of North America, it was eaten by Gold Rush miners as a fresh source of vitamin C against scurvy, which gave it its name; long a foraged wild green, it is now grown deliberately as a specialty winter salad leaf and sold under the name claytonia or winter purslane.