A great new book came out this summer, Eating Wildly: Foraging for Life, Love and the Perfect meal. This book is by Ava Chin, who wrote the Urban Forager blog for the New York Times. I highly recommend you pick up a copy.
Below is a interview with Ava Chin by WYNC in which she discusses Lamb's Quarters, Chenopodium album
Here is a photo of Lamb's Quarters I took a few years back, if you have not tried this wild edible you should do so soon!
Click the image of the book below to buy your copy of Eating Wildly from Amazon