pig weed identification

There is a weed that grows all over the place around here. It REALLY loves dry rice paddies. It looks like the descriptions i see of pig weed but missing some important distinguishing features. I imagine that it is probably missing osme of these features because there are so many different species and sub species in the amaranth family but, as with any other herb i'm not eating it unless i am sure.

I've uploaded two pictures.

My most important question is: are there any poisonous look-alikes? What are the distinguishing features? Some people feel they need to be 100% sure of what specie and sub specie they are foraging, but for me, it is enough to simply stick to herbs and vegetables that are either distinctive or don't have poisonous look a-likes. For instance, even though i know (knew) the distinguishing features of water hemlock, you will never catch me foraging ANYTHING from the lilly family.

I can't see your photos, but here's where I'd like to point out that common names can be very confusing...pigweed means all sorts of things.

Water hemlock is not in the lily family, but in the carrot family. (It, and poison hemlock, look very much like wild carrot, Queen Ann's Lace. ) In fact, they are sometimes called Queen Ann's Lace.

The Lilly family and their look a-likes also contain deadly plants, like Death camass. I am not sure if Death camass is actually a lily though.