Stephensia (fungus)

Stephensia is a genus of truffle-like fungi in the family Pyronemataceae. These fungi are hypogeous, meaning they fruit underground. They are typically small and irregularly shaped, resembling tiny potatoes or pebbles.

Stephensia species are ectomycorrhizal, forming symbiotic relationships with the roots of various trees and shrubs. This relationship is mutually beneficial; the fungus assists the plant in absorbing water and nutrients from the soil, while the plant provides the fungus with carbohydrates produced through photosynthesis.

The genus Stephensia is named in honor of botanist Edith Stephens. Identification of Stephensia species often requires microscopic examination of spores and other anatomical features. Geographic distribution varies depending on the specific species, but they are generally found in temperate regions. The ecological role of Stephensia is significant in forest ecosystems due to their mycorrhizal associations.