Great Wild Green Lambs Quarters

This European relative of spinach and beets, which grows throughout the North America, bears large quantities of edible, spinach-flavored leaves you can collect from mid-spring to late fall.

Surprising Lambs Quarters
http://www.veggiegardeningtips.com/surprising-lambs-quarters/

album
http://foragingpictures.com/plants/Lamb's_quarter/