diskia

Diskia is a genus of fungi belonging to the family Sclerodermataceae. Species within this genus are commonly referred to as earthballs or false truffles. They are characterized by their generally tough, leathery peridium, which is the outer layer of the fruiting body. The gleba, the internal spore-bearing tissue, is typically firm and solid, often becoming powdery or dusty as it matures and the spores develop.

These fungi are found in terrestrial environments, often growing on the ground in woodland and grassland habitats. They are saprobic, meaning they obtain nutrients by decomposing organic matter. Diskia species are ectomycorrhizal, forming symbiotic relationships with the roots of various trees and plants. This association can be beneficial to both the fungus and the host plant, facilitating nutrient exchange.

Identification of Diskia species can be challenging and often requires microscopic examination of spores and other morphological features. While some species may be edible, many are not, and caution should be exercised as they can be mistaken for edible truffles or puffballs. Their ecological role is primarily as decomposers and in supporting forest ecosystems through mycorrhizal associations. The genus Diskia is distributed across various continents, with different species adapted to diverse climatic conditions.