[svalli]

Those are called corms and they can be planted to grow more elephant garlic. If you look at the Spanish video, I have linked on the previous page, it shows that first year the corms grow to huge single clove bulb and second year that becomes a bulb with cloves.
I have not yet grown elephant garlic either, but I have heard that the corms are easily missed when harvesting the crop and the ones remaining in the ground will start growing next spring. I think that elephant garlic getting out of control in my area is not a threat, since the all of the corms may not survive winter in ground.

Sari