Yunnan earthball

What it is

Scleroderma is the earthball genus. Its fruiting bodies are round to irregular, with a thick, tough outer skin, and they release their spores from inside as a dark powder when mature. Scleroderma yunnanense takes its name from the Chinese province of Yunnan, where it is recorded.

Earthballs look like puffballs when young and can be confused with them. The genus is the reason many guides warn against eating any round fungus without identification.

Food use in Yunnan and India

A 2023 Diversity paper describes Scleroderma yunnanense as a popular edible fungus. A 2024 study reports that local tribal communities in Meghalaya, India, prize it as food. These sources support a traditional edible reputation in Yunnan and parts of India.

No detailed preparation method is given. The species’ food-use label is still pending specialist review. The edible reputation is reported in the literature but not established by a verified preparation record.

Poisoning and look-alikes

The safety record for this genus is serious. In September 2019 in Chuxiong County, Yunnan, a Scleroderma cepa, which the authors say resembles the edible S. yunnanense, was misidentified as edible and eaten, and it caused poisoning. A case report on S. albidum describes muscarinic effects, including visual disturbance, slow heart rate and shock, and reports that gastric lavage within an hour of ingestion helped. The toxic compound in that case is unidentified.

The genus is mostly recorded as toxic in the literature, though some species have reported medicinal uses. A 2024 French thesis on poisonings from the genus notes that confusion with edible species remains common. Identification mistakes are the main risk, and the sources do not give a reliable field test that separates the edible species from the toxic ones.

Edibility evidence and limits

The edibility of Scleroderma yunnanense is not settled by the literature. A 2025 taxonomic paper finds that a Yunnan species recorded as edible in a 1984 regional guide has no definitive evidence of edibility, because those records lack sequenced voucher collections. Whether the species named here is the same one used as food has not been confirmed by voucher sequences in the sources reviewed.

This page gives no edibility verdict. Wild earthballs should not be eaten without expert identification, and the poisoning record shows that a mistaken identification can cause serious illness.

Notes

The voucher-backed identity of the species used as food, the local names in Yunnan and Meghalaya, and the preparation methods are not established. A sequenced voucher study would resolve the first.