For a few weeks in the spring we get ramps appearing in our co-op.  They grow in the wild.  Here's a description of them from wikipedia.  The onion part tastes kind of like scallion, and the green leafy part has a distinctive, strong peppery taste.  I put them on my salad today.  I really like them.  Caution:  don't use too much as they can overpower all the other things in your salad.