All the info I have to help with id:
There are 6 of these plants coming up in 3 different flower beds and one in a pot.
I had a mouse family that was stealing many of the flower & vegetable seeds planted over the last 3 years. The mice have been relocated and plants are a sproutin' everywhere!
I did try growing corn a couple of years ago.
I also feed birds and the one growing in the pot has lots of birdseed 'sprouts' that I let grow.
All the plants are coming up in places that receive water.
Location is the high desert of New Mexico.
I don't remember seeing any wild plants that look like this.