Wild Watercress Foraging and Harvesting

Found lots of wild watercress growing along a bike trail in Washington. We did not know what it was at first but just saw a field of healthy bunch of greens growing and decided to go and take a look. I decided to pick one and take a sniff and to my surprise they were watercress and another greens that I am not able to find the name for. Disclaimer: please do not eat or forage anything that you are not aware of. Do your research before consuming anything in the wild.