Tiny 3-petal blue flowers, Commelina?
Found locally in a "wild lawn" area adjacent to a pond, part sun. Roots and shoots at each node, leaves about an inch long, plain medium green, flowers were in a sheath like Commelina communis, but with a 3rd petal, and much smaller than C. communis I've seen before. Inside the sheath are tiny yellow things on white filaments - stamens?
Didn't have my camera out there, just phone. Brought a piece home, completely wilted and the flowers have closed, but it's available to consult since my description is not very scientific.
A different Commelina? A Tradescantia?