The botanical freeloader
The Spotted Coralroot, Corallorhiza maculata, is an orchid that has abandoned photosynthesis entirely. Lacking chlorophyll, this plant cannot produce its own energy from sunlight. Instead, it lives as a myco-heterotroph, a parasite that steals nutrients from fungi in the soil. The orchid's name offers a clue to its lifestyle; Corallorhiza is Greek for "coral root," describing the branching, coral-like rhizomes that form the bulk of the plant underground. These rhizomes are the tools of its trade, infiltrating the vast underground network of a specific fungal group, the family Russulaceae.
This creates a three-part ecological relationship. A nearby tree, often a conifer, forms a mutually beneficial mycorrhizal association with a fungus. The tree provides the fungus with sugars from photosynthesis, and the fungus provides the tree with water and mineral nutrients. The Spotted Coralroot then acts as a freeloader, tapping into this fungal network and siphoning off the nutrients for itself. The fungus gains nothing from this interaction. This specialized diet means the orchid is entirely dependent on the presence of its fungal hosts and cannot be cultivated. The plant can spend years growing entirely underground, only sending up its leafless flowering stalk when conditions are favorable.