Between June and August, mushroom season is in full swing in Yunnan, China. One mushroom, Lanmaoa asiatica, often appears in stir-fries and soups. However, if consumed raw or undercooked, it can lead to bizarre and startling consequences.
Many people report similar experiences after eating this mushroom. They commonly see tiny figures—often described as elves or soldiers—moving around them. It’s a bit like stepping into a fairytale, but it’s rooted in neuroscience.
Hallucinations on the Rise
In Yunnan, local hospitals see hundreds of cases of L. asiatica poisoning each year. Over 90% of patients experience hallucinations, accompanied by symptoms like dizziness and delirium. These episodes can last from one to three days, but thankfully, there have been no recorded deaths or long-term damage.
One local professor shared his experience after eating the mushroom. He saw hundreds of “little people” marching like soldiers, even claiming their heads would detach and stick to the tablecloth. This phenomenon has a specific name: lilliputian hallucinations, named after the tiny beings in Jonathan Swift’s Gulliver’s Travels. It seems to be the main effect of L. asiatica.
A Persistent Mystery
Despite the consistency of the experiences, scientists haven’t yet identified the compound responsible for these hallucinations. Reports of similar symptoms date back to the 1930s and have been observed in places like Papua New Guinea, where researchers documented similar effects.
Colin Domnauer, a researcher at the University of Utah, finds this mystery intriguing. “It’s bizarre that a mushroom could cause fairytale-like visions across cultures,” he said in an interview with the BBC.
The good news is that traditional psychedelic compounds like psilocybin aren’t involved in L. asiatica. Domnauer’s team has ruled out known psychoactive substances in their studies, suggesting that the active compound in this mushroom is something entirely new.
Researching the Unknown
To get closer to understanding L. asiatica, researchers are testing its extracts on mice. This method might help identify the responsible molecules. Current findings indicate that the compounds don’t match any known psychedelics, making this mushroom unique.
Interestingly, similar hallucinations have been reported in Papua New Guinea, hinting at a potential link between species. As Domnauer pointed out, “It could be the same species,” which would be surprising since China and Papua New Guinea don’t typically share such fungi.
Moreover, a related species grows in North America, yet it’s rarely eaten there and no such effects have been reported. The hallucinations from L. asiatica tend to be accidental, resulting from undercooking a supposed culinary mushroom, rather than a result of intentional consumption.
In summary, the curious case of L. asiatica continues to puzzle scientists. The hallucinations it induces are fascinating but carry risks. As research continues, we may get closer to unraveling this enigma, bringing us one step closer to understanding the mind, perception, and the role of mushrooms in our experience.

