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Fungus Among Us Aotearoa, Culture Provenance and Online Conduct

A dispute about the identity of an oyster mushroom culture is a reason to examine records and specimens. It is not, by itself, evidence that anyone sold a misidentified culture or behaved unlawfully.

The question behind the dispute

Henry Kruthoffer and Fungus Among Us Aotearoa have been named in questions about the provenance of a mushroom culture. MycoLogic, a Dunedin-based mushroom business, has also been mentioned as a possible source. The concern is whether a culture described as a New Zealand native oyster could instead contain, or have been confused with, another lineage. These are questions to investigate, not findings about either business or any individual.

We have not seen a documented transfer connecting a particular culture supplied by MycoLogic to Fungus Among Us Aotearoa, a retained specimen from that culture, or a laboratory result demonstrating mixed lineages. Nor do we have a verified label or sale record showing that a fruiting body from such a culture was marketed as native. Without those records, it would be wrong to say a business sold an illegal or misidentified mushroom.

What is established here: MycoLogic publicly describes its work with mushroom cultures and growers in New Zealand. MPI sets requirements for importing fungal cultures and spawn. Neither point proves anything about the identity or origin of a particular culture discussed in a disagreement.

What would establish culture identity?

A trade name such as “native oyster” cannot, on its own, establish species, geographic origin or purity. A useful record begins with the collection or supplier, a dated accession number, the transfer history and a retained sample. If the identity is disputed, a qualified laboratory can compare molecular results with suitable reference material. A single sequence may help identify a species, but a claim about a mixed culture or a uniquely New Zealand lineage may require more sampling and specialist interpretation.

Documents to request for a specific culture
  • The scientific name and the basis for that identification.
  • Where and when the original specimen or culture was obtained.
  • Accession, batch and transfer records linking the specimen to the culture being grown.
  • Any laboratory report, including the sample identifier and the limits of the test.
  • The wording used on product labels or in claims that the strain is native.

Manaaki Whenua explains why DNA sequencing can improve fungal identification, while its diagnostic service can assess submitted fungal material. A photograph of a fruiting body or a social-media post is useful context but cannot settle a culture's chain of custody.

Species identity and legal status are separate questions

New Zealand's import rules apply to living fungal material brought into the country. MPI says an importer must check whether the species is eligible, obtain an import permit and meet the relevant conditions before clearance. That does not allow us to infer that an established culture is illegal merely because its common name is uncertain. A regulatory conclusion about a particular culture needs its scientific identity, origin, movement history and the applicable rules.

Similarly, a claim that a mushroom is native should be backed by evidence of its provenance, not just resemblance to a native species. Growers can improve trust by keeping the culture's identity and origin attached to every batch and being precise about what testing has, and has not, shown.

Keep online conduct separate from culture science

The disagreement has also included allegations of unwanted and threatening messages. We have not reviewed a complete, authenticated correspondence record or a police finding that would verify those allegations or identify the sender of any anonymous messages. We do not attribute threats or criminal conduct to Henry Kruthoffer, Fungus Among Us Aotearoa, MycoLogic or anyone else on the material available.

Anyone receiving a message they consider threatening should preserve the original message and its metadata, avoid escalating the exchange publicly, and report it through the platform or to New Zealand Police. Police advise using 105 for non-emergency reports and 111 if someone is in immediate danger. The existence of a personal dispute does not answer a scientific or biosecurity question.

A practical way forward

For any culture at the centre of a dispute, identify the exact batch, obtain the seller's description and transfer records, retain a sample, and seek independent identification where needed. Ask the people or businesses named for their response before publishing a conclusion about their conduct. If the concern is about import compliance, supply the evidence to MPI rather than assuming a breach from a name or photograph.

Our position: Culture provenance should be tested with traceable records and appropriate science. Serious claims about people require equally strong evidence. The unanswered questions here remain unanswered.

Further reading