Plant vs Compound and Mushroom vs Sclerotium Distinctions in Law

Why the distinction matters

Drug laws are written in words. Some list a chemical (such as psilocybin). Some list a named plant or fungus. Some list a preparation. Which wording a law uses can change how it applies to a plant, a mushroom, a sclerotium (a hardened form of some fungi, often sold under the name "truffle") or a lab-made compound. This page explains the wording differences and shows what we read. It is education, not legal advice, and laws change. Each legal statement names the place, substance, activity and official source, read 2026-10-22.

Plant vs compound

International treaty. The 1971 UN Convention on Psychotropic Substances lists psilocine and psilocybine by chemical name in its schedules. [1] Its rules for Schedule I substances include prohibiting all use except for scientific and very limited medical purposes by duly authorized persons, and requiring a special licence or prior authorization for manufacture, trade, distribution and possession. [1] The Convention text we read names substances; it also separately mentions "plants" that contain scheduled substances when allowing certain reservations. [1] How each country then writes its own law is up to that country.

United States (federal). The Schedule I rule lists substances by name: psilocybin, psilocyn, mescaline and dimethyltryptamine (DMT). [2] It also lists peyote as a plant, defined as all parts of Lophophora williamsii, growing or not, its seeds, extracts and preparations. [2] So in the same schedule, mescaline is a compound entry and peyote is a plant entry. Wording for the hallucinogen list covers "any material, compound, mixture, or preparation, which contains any quantity" of the listed substances. [2] The text we read does not use the words mushroom, ayahuasca, sclerotia, San Pedro or Salvia. [2] Whether a particular plant or fungus is covered therefore depends on whether it contains a listed substance and on how courts and prosecutors apply the wording, which we did not review.

This is why a plant name and a compound name are not interchangeable. See mescaline, DMT and ayahuasca for the substances and the preparation, which are different things.

Mushroom vs sclerotium (truffle)

A mushroom and a sclerotium are different structures of the fungus; the biology is explained in psilocybin truffles and mushrooms vs truffles. Whether the law treats them differently depends entirely on its wording.

Netherlands. The Opium Act (Opiumwet), in the version valid from 17 September 2026 that we read, lists psilocine and psilocybine as substances. [3] It also has a separate entry headed "Paddo's," defined as "paddenstoelen die van nature de stof psilocine of psilocybine bevatten," meaning mushrooms that naturally contain psilocin or psilocybin, with a species list. [3] That entry sits in the Lijst II part of the text we read. [3] The Act bans activities such as importing or exporting, cultivating, preparing, selling, supplying, transporting, possessing and manufacturing for the items on its lists. [3] The word "truffel" does not appear in the Act text we read. [3] The Dutch government's own page on drug offences does not mention magic mushrooms or truffles. [4]

We could not read an official Dutch government statement on how truffles are treated, so we make no statement about whether truffle sale or possession is permitted there. Popular articles often say the Netherlands allows "truffles"; we did not verify that from an official source, and the law, enforcement and any rules for sale can change.

United States. The federal wording is by substance content, not by organism part. [2] The text we read does not name mushrooms or sclerotia. [2]

How to read any law like this

• Find the exact list or schedule entry. Is it a chemical, a named plant, a defined mushroom list, or "any material containing"?
• Look for definitions of plant parts, preparations and extracts.
• Remember that other laws (customs, health, state or local law) may apply at the same time.
• A product's online description or label does not tell you its legal status.

Related guides

Controlled-substance status explains scheduling in general. Psychedelic legal status by country gives the wider view. Psilocybin vs psilocin explains the two compounds.