Elephant garlic or wild leek. A head of garlic having a large single clove and bearing more resemblance to a leek.
Wild leek (US: ramps). A relative of the leek with a pearly white bulb which turns into an almost pink stem and green, lily-of-the-valley shaped leaves. They have a fierce flavour when raw which is softened and sweetened by blanching. They have a powerful smell so must be kept carefully wrapped to prevent them contaminating other foods. Their relatively rarity makes them highly sought-after. They are considered to be lovely to look at and many cooks try to keep them intact in dishes.
Crow garlic. A form of garlic which is more a weed than a culinary gift. It's aftertaste is relatively bitter, and it imparts a garlic flavour to the meat of animals which graze wehre it is prevalent. It is invasive in some areas.