Overview
The Digüeñe Fungus (Cyttaria espinosae), known colloquially across Chile as ‘digüeñe’ or ‘lihueñe,’ is a bizarre and iconic ascomycete fungus endemic to the temperate southern beech (Nothofagus) forests of central and southern Chile. Emerging in vibrant spring clusters along the branches of mature roble trees (Nothofagus obliqua), these globose, golfball-like fruiting bodies have been harvested for thousands of years by the indigenous Mapuche people as a prized wild edible delicacy, playing an integral role in southern South American forest ethnomycology.
Biology and Physical Characteristics
Cyttaria espinosae produces spherical to obovoid fruiting bodies (stromata) that erupt in tight clusters from large, woody tumor-like galls on host tree branches. When young, the fungi are smooth, glossy, and covered in a delicate whitish membranous membrane; as they mature, the outer skin ruptures to reveal a striking honeycombed surface composed of deep, bright orange-yellow cups (apothecia). Inside these cups, cylindrical microscopic asci produce dark, single-celled ascospores. The internal flesh is spongy, crisp, and mucilaginous, possessing a mild, sweet, refreshing flavor that is eaten raw in traditional Chilean salads with cilantro and olive oil.
Behavior and Ecology
Cyttaria espinosae is an obligate biotrophic parasite with strict host specificity, colonizing only living trees in the subgenus Nothofagus. Unlike destructive rot fungi that kill their hosts, Cyttaria stimulates the host tree’s cambium to produce perennial woody galls that can persist on branches for decades without toppling the tree. Fruiting occurs during a narrow seasonal window in early spring (September to November), triggered by rising temperatures and spring rains, providing a vital seasonal food source for native forest parakeets, rodents, and forest-floor beetles.
Conservation and Human Impact
While still relatively common throughout protected national parks in Chile, Cyttaria espinosae faces mounting pressures from the widespread clearance of old-growth native Nothofagus forests for commercial pine and eucalyptus timber plantations, cattle ranching, and agricultural expansion. Furthermore, unmanaged commercial harvesting for urban restaurants has raised concerns about branch damage on wild trees. Fostering sustainable Mapuche foraging cooperatives, preserving native Valdivian temperate rainforests, and protecting mature roble stands ensure the species’ continued abundance.
Interesting Factoid
Known as ‘Indian bread’ in Patagonian folklore, the Digüeñe looks like a bright orange golf ball with a honeycombed surface, and is so sweet and crisp that local Chilean families harvest it directly from tree branches to eat raw in spring salads.
Last updated: October 2026