I have been unable to identify this plant beyond that it might be a type of goosefoot. It is coming up in an area where it has been difficult to seed desirable native plants because there is no topsoil and I don't have water to irrigate.

The seedlings cover the ground and then develop a stalk with the same leaves. It probably arrived with construction materials, although last year I did not see mature plants because the area was both sprayed and graded when they were still small. This year there is even more of it. 

One person said it was moth mullein, but it doesn't match photos I've seen of first year moth mullein and doesn't stay a small rosette for long.

I am near Carter Lake at about 6500 feet. Thanks!