First thing that popped into my mind:
Onion phytoplasma
http://www.forestryimages.org/browse...imgnum=5365849
Those sure do look cool, though. And yours don't look quite as messed up as most of the images on google.
Of note: I have some allium schubertii, and although the ball gets almost 12 inches in diameter, the entire stem only gets about 18" tall. Come to think of it, I saved some seed from them. I don't know if it's any good, but if anyone wants some, let me know.