Its perennial in my zone 9, clumping and smells strongly of onion.
You just answere your own question. It should be an Allium of some kind.
ever planted 'top setting' or egyptian onions? Some ornamental kinds might do that too, I guess.
Yes, I knew it was some type of onion (allium) but if anyone can narrow it down further, I'd appreciate.
Is it edible and do people actually use it for anything that you know of?
The bulbs and other parts are edible and cultivated by some as a food crop. See for more: http://www.pfaf.org/user/Plant.aspx?LatinName=Allium+canadense
Thanks, greenthumb! It is growing right where I am about to plant lima beans so very glad you sent the link which says not to grow them near each other.