Loose Leaf Tea does not come from a specific plant and is not a single type of Tea.
While tea today is typically prepared from tea bags, which have roughly 94% of the market, the traditional method of preparing tea is to steep tea leaves directly in the water.
Loose Leaf Tea is the traditional method, a method of preparing tea using plant leaves instead of bags.
This has many benefits over the tea bag method but also requires a different process of preparation.