ID - Is it alfalfa?

The small leaved plant directly in the middle.  The little flower on the end of the stalk is purple.  I just ripped tons of this out and piled on on a path - later I saw pics of alfalfa  - I thought it looked very similar.
Does it look like alfalfa to anyone else?

http://chestofbooks.com/flora-plants/weeds/Fodder-Pasture-Plants/Alfalfa-Medicago-Saliva-L.html

check out this website, pretty good drawing of the plant.

Your photo is a little hard to ID from. Alfalfa often has several stems/plant.

Thank you.  I am pretty sure that is what it is.  I had already yanked up a bunch of it before I started paying attention.