Alliums are a huge family - it includes table onions, chives and the gorgeous garden "onions".
The latter come in many varieties from the tiny yellow allium molly to the huge football sized allium christophii. I love them all. They are very easy to grow, the majority are bulbs that are planted in the fall just like daffodils and tulips.
Like tulips they are sometimes eaten by little animals - I would have thought the onion taste would deter them but apparently not. The most long lasting I have found is the huge and regal Allium Globemaster. They are expensive but just a few bulbs make a big show.
Coincidentally my John Scheepers bulb catalogue came in the mail today - I am going to try some new alliums for next summer.