Toistia

Toistia is a genus of fungi belonging to the family Tulasnellaceae. Species within this genus are primarily saprobic, meaning they obtain nutrients from dead organic matter, and are often found in association with the roots of plants, particularly trees. These fungi are characterized by their basidiocarps, which are typically small, fleshy, and often exhibit a resupinate or effused-reflexed growth form, meaning they spread along the substrate surface or have partially uplifted margins. The hymenium, the spore-producing layer, is usually smooth or slightly wrinkled.

Reproduction in Toistia occurs through basidiospores, which are typically hyaline, smooth, and often globose or subglobose in shape. While visually inconspicuous, Toistia plays a role in decomposition and nutrient cycling within forest ecosystems. Its ecological interactions, particularly its mycorrhizal associations with plants, are an area of ongoing research. The taxonomy of Toistia has been refined through morphological and molecular studies, distinguishing it from closely related genera within the Tulasnellaceae. Further investigation is needed to fully understand the diversity and ecological significance of this fungal genus.