Can anyone I'D this weed?

[ZEROPILOT]

This weed grows in my yard. Mostly around the walkways. My torts eat it. The bottom of the leaves are purpleish.

 

[Blakem]

Looks like wild mustard greens. If others agree, then it's edible.

 

[Tom]

I agree, but I don't think I've ever noticed purple color on the underside of my wild mustard here.

 

[ascott]

http://www2.estrellamountain.edu/faculty/farabee/BIOBK/selection.gif

 

[ZEROPILOT]

Now I'm thinking it could have originated from my wifes bird feeder. She has wild bird food but adds some left over from her Canary and Finch flocks. The rains could have deposited the seeds down the walkway.Thanks for your help!

 

[Iochroma]

I agree it some Brassica; radish, mustard, or rapeseed most likely