Nor do those examples complete the list of justifiably fuzzy distinctions in such matters; at the opposite extreme from parasitism, parasitoidy in turn grades into predation.
This extreme inquiline is represented only by female and pupoid type male individuals, whose morphology and anatomy indicate a highly specialized level of parasitism.
Unlike most plants, it does not contain chlorophyll; it is a myco-heterotroph, getting its food through parasitism upon fungi rather than photosynthesis.