rosette at the base of the plant, and are 0.5-4 cm long, with an often long petiole (exceptionally up to 20 cm long). The small pink or white flowers have five petals 2-6 mm long; they appear from February to May or June, and are grouped 5-40 together above a

pair of leaves that are united together around the stem to appear as one circular leaf. Mature plants have numerous erect to spreading stems that branch from the base.It is common in the spring, and it prefers cool, damp conditions. It first appears in sunlit areas after the first heavy rains. Though, the best stands are found in shaded areas, especially in the uplands, into the early summer. As the days get hotter, the leaves turn a deep red color as they dry out.

There are three ill-defined geographical subspecies:

• Claytonia perfoliata subsp. perfoliata: Pacific coastal United States and southwest Canada
• Claytonia perfoliata subsp. intermontana: interior western United States
• Claytonia perfoliata subsp. mexicana: coastal southern California and Arizona south through Mexico to Guatemala
• Claytonia perfoliata subsp. utahensis: recognised as local subspecies in Utah.

Uses
The common name Miner's lettuce is named after the California gold rush miners who ate it to get their vitamin C to prevent scurvy. It can be eaten as a leaf vegetable. Most commonly it is eaten raw in salads, but it is not quite as delicate as other lettuce. Sometimes it is boiled like spinach, which in fact it resembles in taste.

It is widely naturalized in western Europe, where it was introduced in 1749.