I grew some onions from bulbs at the begining of the summer, most grew quite nicely considering I have never grown anything before, However right inbetween my onions was this strange plant. it looked just like the onions, smelt the same, same colour but with just one big stalk. This eventually grew a huge seed head unlike my other onions so I decided to drag it up and have a look at it. Sure enough underneath was no onion just a thick root. i have lots of seeds from it however and I was wondering what it was before I save them. I have some pics if anyone has seen this before.