Whats the difference between a shamrock and a clover?

Just curious..

Whats the difference between a shamrock and a clover?
The shamrock, an unofficial symbol of Ireland and Boston, Massachusetts, is a three-leafed young white clover, sometimes (rarely nowadays) Trifolium repens (white clover, known in Irish as seamair bhán) but more usually today Trifolium dubium (lesser clover, Irish: seamair bhuí). However, other three-leafed plants — such as black medic (Medicago lupulina), red clover (Trifolium pratense), and Common wood sorrel (genus Oxalis) — are sometimes designated as shamrocks. The shamrock was traditionally used for its medical properties and was a popular motif in Victorian times. It is also a common way to represent Saint Patricks day, a holiday celebrated on March, 17.
Reply:The shamrock is a type of white clover. There are 300 different plants that are in the clover genus, and the shamrock is one of them.
Reply:shamrock is a three-leafed young white clover


from: http://en.wikipedia.org/wiki/Shamrock





The "shamrock" of popular iconography is sometimes considered to be young clover


from: http://en.wikipedia.org/wiki/Clover
Reply:number of leaves.
Reply:The name. Shamrock is simply an old Irish word for "clover".
Reply:number of leaves
Reply:same thing.
Reply:same thing aren't they?
Reply:shamrock has 3 leafs clover has 4