Miner's Lettuce Edible but can be toxic

Miner's lettuce, a native winter annual broadleaf plant, is part of a complex of species and subspecies with slightly varying characteristics. It is found throughout California (except for the lower desert areas) to about 6600 feet (2000 m). Miner’s lettuce inhabits natural plant communities, agricultural land, and urban areas, with a preference for cool, damp conditions. It dries up with the onset of hot spring weather. Although the leaves are sometimes cultivated or collected for salad greens, occasionally it accumulates soluble oxalates, which can be toxic when ingested.