I've posted before about parasitic plants that get all of their nutrients from root connections to either fungi or the roots of other plants. Here are a couple more species that I've encountered recently.
Orobranche uniflora (One-flowered Cancer Root) is a pretty little plant, with a number of flowers each on their own individual stalk.
Ontario has four species of Coralroot Orchids (Corralorhiza), and with a couple of recent encounters with Early Coralroot (C. trifida), I've now photographed all of them in bloom. Unlike the other three species, trifida does have chlorophyll and is only partially parasitic.
This is the much showier and larger Striped Coralroot (C. striata)