Overview
The Basket Fungus (Ileodictyon cibarium), known in Māori tradition as tūtæ-kēhua (‘ghost droppings’) or kupenga-o-te-atua (‘fishing net of the god’), is one of the most astonishing fungal oddities on Earth. Emerging from a subterranean gelatinous egg, this extraordinary saprotrophic stinkhorn expands into an immaculate, spherical hollow cage of interlocking white ribs resembling an intricate geodesic dome or miniature soccer ball, which frequently detaches from its base to blow across the forest floor like a tumbleweed.
Biology and Physical Characteristics
Ileodictyon cibarium begins its lifecycle as an unassuming, submerged whitish-gray ‘egg’ filled with gelatinous mucilage. Upon maturity, the egg’s outer peridium ruptures under osmotic water pressure, allowing the compressed inner lattice to erupt and expand explosively within a few hours. The fully expanded receptacle forms a hollow, globose cage composed of 10 to 30 smooth, spongy, snow-white arms that branch and fuse seamlessly into polygonal meshes. The interior surface of these ribs is coated in a dark brownish-green, foul-smelling slime called the gleba, which carries millions of microscopic reproductive spores.
Behavior and Ecology
As an obligate saprotroph, the mycelium breaks down complex lignins and cellulose in damp wood and organic mulch. To disperse its spores, Ileodictyon cibarium deploys an ingenious olfactory trick: the glebal slime emits a pungent, rotten-meat odor that lures blowflies and carrion beetles from great distances. The insects feast on the nutritious slime, coating their bodies and ingesting spores that are subsequently deposited throughout the forest. Uniquely, the expanded lattice easily snaps free from its volval cup, allowing gusts of wind to roll the intact spore-covered basket across open lawns and forest trails like a fungal tumbleweed.
Conservation and Human Impact
Ileodictyon cibarium is thriving and widespread across New Zealand and southern Australia, adapting successfully to suburban mulch beds and municipal parks as well as pristine national park native forests. Historically, Māori foragers occasionally harvested the immature gelatinous egg stage as emergency food after peeling away the foul gleba layer, though mature fruiting cages are inedible due to their overpowering fetid stench.
Interesting Factoid
Unlike mushrooms anchored firmly to the ground, once the Basket Fungus expands into its hollow white soccer-ball cage, it detaches from its base and rolls across the forest floor in the wind like a ghostly tumbleweed.
Last updated: October 2026