What term refers to a combination of two or more plants?

The term that refers to a combination of two or more plants is "mixture." In the context of botany and herbal medicine, a mixture can involve combining different plant materials, such as leaves, roots, or other parts, to create a product that utilizes the unique properties and benefits of each plant involved. This can allow for the synergistic effects of the combined plants, enhancing their therapeutic benefits or creating a broader spectrum of effects that might not be achieved by a single plant alone.

Other terms in the choices have specific meanings that don't align with the definition of combining multiple plants. Maceration refers to the process of softening or breaking down plant material, often in a solvent, to extract active compounds; infusion is a method of extracting flavors or medicinal properties from plants by soaking them in a liquid, typically hot water; and extract refers to a concentrated preparation obtained from plant material through various extraction methods. These processes may involve multiple plants, but they specifically describe methods of preparation rather than the act of combining plants themselves.