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Yellow Knight, Man on Horseback
The yellow knight is a yellow, pine-associated Tricholoma that was long eaten in Europe. Since 2001 it has been linked to rhabdomyolysis (muscle breakdown) in people who ate it at several meals in a short period, and it is now advised against as food. The name covers considerable cryptic diversity, and several North American species have probably been called by it.
Deadly poisonous; do not eat. Associated with rhabdomyolysis after three or more meals within about two weeks: muscle weakness and pain starting 1-4 days after the last meal, stiffness and dark urine. Some patients have died during treatment. A 2018 trial of a single meal found no effects, but a 2020 review still advised against eating it. No poisonings are reported from North America.
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Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
