I think that is Tea
The Asian plant with leaves used as a beverage is called Camellia sinensis. It is commonly known as tea.
Betel leaves(Piper betle)are widely used as a digestive stimulant in Southeast Asia.In some places,Areca nuts are used with betel leaves.
fennel originated in Italy then brought to other countries
cardomom is an spice used in Asian food!
Leaves collect sunlight and convert it into sugar that's used as energy for the plant. That's the simple explanation, I don't remember all the details. Look up the rest on Wikipedia.
The leaves of the Tobacco plant (Nicotiana tabacum) are used to produce tobacco.
Camellia sinensis, or the tea plant's leaves are used to produce white tea, green tea, black tea and oolong tea, the difference is only a matter of processing and additives.
Betel leaves(Piper betle)are widely used as a digestive stimulant in Southeast Asia.In some places,Areca nuts are used with betel leaves.
fennel originated in Italy then brought to other countries
Cocaine, from the coca leaves originally used to brew the beverage.
Indigo plant leaves are used for dying cotton.
kava
A flower is part of a plant, which has leaves. Leaves provide the plant with energy through photosynthesis.
Flowers and leaves are dried and used medicinally. The leaves are at their most potent when harvested just after the plant flowers.
cardomom is an spice used in Asian food!
The leaves and the central stem from which the leaves grow are used when cooking cabbages.
Leaves collect sunlight and convert it into sugar that's used as energy for the plant. That's the simple explanation, I don't remember all the details. Look up the rest on Wikipedia.
The leaves and roots of the belladonna plant.