althéia

Altheia is a genus of fungi belonging to the family Amanitaceae. These mushrooms are characterized by their moderate to large size, often with a distinctive cap shape and color. The genus name Altheia is derived from Greek mythology, referring to a goddess or divine healer, though the exact reasoning for this specific nomenclature in mycology is not widely documented.

Species within the Altheia genus typically possess a cap that can range from convex to flattened with age, often featuring a smooth or slightly viscid surface. The color of the cap varies significantly among species, with common hues including white, cream, yellow, and various shades of brown. Gills are usually free from the stem and are often closely spaced. The stem, or stipe, is generally robust and may have a ring, or annulus, and a volva at its base, though these features can be reduced or absent in some species.

Altheia fungi are primarily found in temperate regions across the globe, often growing in woodland or forest environments. They are known to form ectomycorrhizal associations with trees, which is a symbiotic relationship where the fungus helps the tree absorb nutrients from the soil in exchange for carbohydrates. The edibility of Altheia species is diverse, with some being considered edible and highly prized, while others are known to be poisonous or inedible due to their texture or taste. Due to the potential for misidentification with toxic species, caution is advised when foraging for mushrooms. Scientific research continues to explore the ecological roles and biochemical properties of Altheia.