What kind of weed is this?


I have looked at several different plant\weed sites and cannot identify this weed. It is located in western Wisconsin in an old ag field.
Not sure. But someone on the other forum shared the link to a plant ID app.
I just downloaded it yesterday (it's free) so I've only tried it on about a half dozen plants. The only one that it didn't get correct was Japanese Stilt Grass. There are so many different grasses that I'm not sure that an app could ID all of them correctly.
Pl@ntNet is easy to use. Just snap a pic of the leaf, or flower, or bark and it tells you what it is. It also gives a few photos of known weed specie to compare your plant. So far, I'm blown away that a single pic, on an app can ID a plant.