Monotropa uniflora

Blooms in summer, but remnants can be found in winter. Lacking chlorophyll, "it gets its nutrition by parasitizing a fungus, a relationship called myco-heterotrophy. The fungus in turn is in a mutualistic symbotic relationship with a tree (i.e., the fungus and tree exchange nutrients, minerals, and water in a fashion that benefits both species). So Indian Pipe is also indirectly parasitizing the tree." (David Werier, Solidago 21-1)