Ttisia

Ttisia is a genus of fungi belonging to the family Tuberaceae. These fungi are known for their subterranean fruiting bodies, commonly referred to as truffles. Ttisia species are often found in ectomycorrhizal associations with trees, particularly oak and hazel species, playing a crucial role in nutrient exchange for their host plants. The fruiting bodies, or truffles, of Ttisia species are typically round or irregular in shape and vary in size. Their internal structure, or gleba, is characterized by a marbled appearance, with veins of sterile tissue running through the spore-bearing tissue. The spores themselves are usually spherical and ornamented.

The distribution of Ttisia species is widespread, with many found in temperate regions of Europe, North America, and Asia. While some Ttisia species produce highly prized culinary truffles, others are less commercially significant or are not considered edible. The identification of Ttisia species often relies on morphological characteristics of the fruiting body and microscopic examination of spores, though molecular techniques are increasingly used for precise classification. Research into Ttisia continues to explore their ecological roles, genetic diversity, and potential applications.