I'm sure i havesome anecdotal information about this shot, but I'mat a loss at the moment. A small (6 - 15") plant with clover-likeleaves branching from a main stem. Usually one toseveral small yellow flowers only 1/2" across with5 petals. The leaves are more heart-shaped thanclover and fold up along the main vein when the sungoes down and open back up in the morning. May to JulyDry soil, roadsides, fields and wasteProbably the 2nd plant that childrenlearn, because the sourgrass is very tasty. However, because of a large amount of oxalic acid,it should not be consumed in any quantity. Tasteadditions to salads are perfect.and 10 stamens with the pistil erect. Anunfurled flower is right behind this