The 5 or 6 or More Kingdom System.
Most plants have chlorophyll, a green pigment.
And they serve as the basis for the food chain. Thus, these plants are heterotrophs and usually parasitic. These plants are detrimental to their host. Indian pipes are completely white, but not directly parasitic. Instead, a fungus serves as a bridge between the roots of the Indian pipe and a host plant, transferring nutrients from host to Indian pipe.