There are different types or subspecies of garlic, most notably hardneck garlic and softneck Garlic.

http://en.wikipedia.org/wiki/Garlic

There are different types or subspecies of garlic, most notably hardneck garlic and softneck garlic. The latitude where the garlic is grown affects the choice of type as garlic can be day-length sensitive. Hardneck garlic is generally grown in cooler climates; softneck garlic is generally grown closer to the equator.