Erubescent Miner's Lettuce, Red Miner's Lettuce, Redstem Springbeauty
Claytonia rubra ssp. rubra
Synonyms: Claytonia perfoliata (in part), Montia rubra

Note the basal leaves of red miner's lettuce which have blades that are roughly triangular in outline and are generally spreading to somewhat ascending.
Paul Slichter