This is a Rocombole type garlic.
This garlic must get it’s name from the occasional black (gray) splotches on the skin, which you can see on the bulb to the right.
The original planting stock I got from The Garlic Store was absolutely huge, the largest bulb of garlic I have ever seen besides elephant garlic. This store is located in Colorado, and perhaps that’s home to this variety. All the cloves I planted produced healthy bulbs, but nothing approaching the original bulb. Perhaps when this one gets acclimated it will get larger.
This is a very promising garlic.