Native to Europe, North Africa and West Asia. It has been widely introduced elsewhere in the world as a pasture crop.
The symbiotic bacteria living in the root nodules of White Clover fix nitrogen, which reduced or eliminates the need for mineral fertilizers in “bio” or “organic” lawns coming in vogue nowadays. Provides a dense cover squeezing out other, non-wanted weeds, like the highly allergenic pest "Common Ragweed ":http://www.redbubble.com/mybubble/art/259657-2-... Ambrosia artemisifolia is.
White Clover leaves are rich sources of vegetable protein; not easy to digest raw but after boiling them for 5-10 minutes they are easily digestible and tasty. Dried flower heads and seed pods ground up yield a nutritious flour or steeped in hot water result in a tasty, tea-like infusion.