The term "Miner's Lettuce seems to be a very general name. However, Siberian Miner's Lettuce refers to Claytonia siberica (synonym is Montia sibirica)

Siberian Miner's Lettuce has has two leaves that are pointed and oval shaped. The white flower has thin pink veins. The petals have notched tips. Thus my conclusion that this is Siberian Miner’s Lettuce


The site: http://www.oregonwild.org/ says: " true Miner’s lettuce (not Western Spring Beauty) can be best distinguished by a single round, or “perfoliate” leaf that completely surrounds the flowering stem, located just below the flowers. Instead of having a wholly circular leaf penetrated through the middle by the stem, Western Spring Beauty, instead has a pair of large stem leaves placed immediately opposite one another, but are not fully united (as in true Miner’s Lettuce, Claytonia perfoliata)."

It also says: "While it is best, of course, to always distinguish the specific species of any thing you may plan to eat, the good news is all Western Spring Beauty species in the Genus Claytonia, as well as species (now or before) placed in the genus Montia, are all edible—whatever they call them!