Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up of 2 single leaves showing serrated edges, cut out against white.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up of sprig showing serrated leaves cut out against white.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Sweet leaf, Stevia rebaudiana, a natural sweetener. Close up showing serrated leaves.

Pink ice, Protea neriifolia x susannae.

Pink ice, Protea neriifolia x susannae.

Sugar cane, Saccharum officinarum.

Sugar cane, Saccharum officinarum.