Tapinella panuoides explained

Tapinella panuoides, also known as oyster rollrim,^[1] and as fan pax from its former binomial Paxillus panuoides, is a fungus species in the genus Tapinella.

Atromentin is a phenolic compound. The first enzymes in its biosynthesis have been characterised in T. panuoides.^[2]

Despite its pleasant taste, the species is poisonous.^[3] In North America it can be confused with poisonous western jack o'lanterns, edible chanterelle mushrooms, false chanterelles (Hygrophoropsis aurantiaca), Crepidotus, or Phyllotopsis.

It grows on wood or in "lignin-rich humus," has little or no stalk where it emerges from the substrate, and the gills appear to be crimped, forked, or crosshatched close to the base.^[4]

Notes and References

1. Web site: Oyster Rollrim (Tapinella panuoides) . 2024-02-25 . iNaturalist . en.
2. Characterization of the atromentin biosynthesis genes and enzymes in the homobasidiomycete Tapinella panuoides. Patrick Schneider, Sarah Bouhired and Dirk Hoffmeister, Fungal Genetics and Biology, Volume 45, Issue 11, November 2008, pages 1487-1496,
3. Book: Miller Jr., Orson K.. North American Mushrooms: A Field Guide to Edible and Inedible Fungi. Miller. Hope H.. FalconGuide. 2006. 978-0-7627-3109-1. Guilford, CN. 288. Orson K. Miller Jr..
4. Book: Arora, David . Mushrooms demystified: a comprehensive guide to the fleshy fungi . 1986 . Ten Speed Press . 978-0-89815-169-5 . Second . Berkeley . 476–477.