I’m not sure. I think it is a difficult one, since nobody else has attempted to reply. 🙁 It is in family Tetragnathidae. Leucauge venusta is variable in colors and shapes, but this looks different to me. L. venusta often has green reflective legs and I’ve only found them in trees. I’ve found other Tetragnathidae in low plants only.
The picture might not be the best, but I did get a good look at it and I was certain it was L. venusta at the time. She crawled out of the tall grass and onto my shoe and I was dazzled by her beauty.