Fritillaria imperialis (Crown Imperial) I personally believe that this is the most amazing spring bulb of all. It has great height, great colour, and man does it smell awful !!! That said, it does to some degree keep destructive creatures at bay. These are very expensive here in Canada and can run up to about 5 dollars CDN a bulb, same in USA dollars. Planting these can be difficult, as the bulb can be difficult to determine which is the top. If that is the case always plant them on their side. They like a lot of sun as well, but give the place where they can have mid afternoon shade and is cooler. The flower will last much longer.
I posted this plant on March 27 2010 as it just came out of the ground.