Henna leaves come from the henna plant (Lawsonia inermis) and are used to create a natural dye for hair and skin. When the leaves are dried and ground into a powder, they release a reddish-brown pigment. Henna is commonly used for hair coloring and conditioning, as well as for creating temporary body art, such as intricate mehndi designs. The leaves are also known for their cooling and antimicrobial properties.