Luminescent Panellus

(Panellus stipticus)

Conservation Status
Luminescent Panellus
Photo by Luciearl
  IUCN Red List

not listed


NNR - Unranked


not listed


Luminescent Panellus is a common, small, bioluminescent, gilled mushroom. It occurs in Europe, Asia, Western Australia, North America, and Central America. In the United States it occurs east of the Great Plains and west of the Rocky Mountains. It is found usually in clusters or in tightly overlapping tiers on the sides or ends of logs, fallen branches, and stumps. Occasionally it is found on the trunk of a living tree. It grows on hardwoods, especially oak, birch, maple, hickory, pecan, chestnut, and ash, but it has also been reported on eastern white pine and loblolly pine. It obtains its nutrients from decaying wood (saprobic). It causes white rot in wood. New fruiting bodies are formed from September through November, sometimes also in the spring, but they are persistent and can be seen year-round.

When it first appears, the cap is convex and tan to pale yellowish-brown. The margins are rolled inward and have fragments of tissue, shredded remnants of the partial veil, hanging from them. The upper surface is dry and is covered with velvety or woolly hairs. As it ages the cap flattens and spreads out from the growing surface parallel to the ground. Mature caps are kidney-shaped, fan-shaped, or semicircular, and are 316 to 1¼ (0.5 to 3.0 cm) in diameter. They are flat below but slightly convex above, being thicker in the middle (plano-convex). The upper surface is often cracked. If exposed to direct sunlight the color changes to cinnamon brown. Caps in diffuse light remain pale.

The gills are yellowish-brown, closely spaced, narrow, and often forked. When young, they are broadly attached and may slightly run down the stalk. As the mushroom ages they pull away from the stalk. Between the main gills there are short veins of varying lengths gills that attach to the margin but do not extend all the way to the stalk. There are also numerous cross-veins that connect adjacent gills together.

Occasionally, there is no stalk. When present, the stalk is 316 to ¾ (5 to 20 mm) long, to 516 (3 to 8 mm) thick. It is attached off-center near or at the side of the cap. It is the same color as the cap or somewhat paler.

The flesh is thin, tough, and whitish, pale yellowish, or pale brownish. Its bitter taste and tough texture make it inedible.

The spore print is white.


Similar Species

Habitat and Hosts

Mostly hardwoods, especially oak, birch, maple, hickory, pecan, chestnut, and ash; sometimes also eastern white pine and loblolly pine.




Mostly September through November, sometimes also in spring


This mushroom has been used in traditional Chinese medicine as a styptic, to stop bleeding. This is the source of the specific epithet stipticus. It was also used as a “violent purgative”.


Distribution Map



4, 24, 26, 29, 30, 77.





  Kingdom Fungi (fungi)  
  Subkingdom Dikarya  
  Phylum Basidiomycota (club fungi)  
  Subphylum Agaricomycotina (jelly fungi, yeasts, and mushrooms)  
  Class Agaricomycetes (mushrooms, bracket fungi, puffballs, and allies)  
  Subclass Agaricomycetidae  
  Order Agaricales (common gilled mushrooms and allies)  
  Suborder Marasmiineae  




Panellus (oysterlings)  

Since it was first described in 1783 as Agaracus stypticus, this mushroom has been moved several times to different genera. In 1879 it was moved to the genus Panellus, where it remains today.

This mushroom was former placed in the family Tricholomataceae. That was a wastebasket family containing unrelated species that could not be placed in other families. A recent molecular phylogenetic study (Monclavo, et al., 2002) showed that the genus Panellus was closely related to the genus Mycena, and Panellus was moved to the family Mycenaceae.




Agaricus stypticus

Merulius stipticus

Crepidopus stypticus

Lentinus stipticus

Panus stipticus

Pleurotus stipticus

Pocillaria stiptica

Rhipidium stipticum


Common Names


Astringent Panus

Bitter Oyster

Luminescent Panellus

Stiptic Sungus











Partial veil

A protective covering over the gills or pores of a developing mushroom. At maturity it disappears, collapses into a ring around the stalk, or wears away into a cobwebby covering and ring zone.



A term often used for saprotrophic fungi. Referring to fungi that obtain their nutrients from decayed organic matter.





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    Luminescent Panellus      

Honey Fae (Farah)


Bioluminescent species!

    Luminescent Panellus      








Visitor Videos

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Other Videos
  How I discovered Panellus Stipticus, aka Bitter Oyster Mushroom
Reclaimed Man

Oct 1, 2020

  Panellus stipticus

13,429 views Aug 17, 2012

This nondescript little mushroom has gills that glow in the dark. Here you see it in light, then by its own, greenish light. It's common in the forests of northeastern North America. It grows elsewhere as well, but elsewhere (sadly) it doesn't glow.

More about it here:

  A Mushroom That Glows In The Dark? (Panellus stipticus)
FreshCap Shorts

Dec 13, 2021

This mushroom really does glow! Panellus stipticus has a green glow, used to attract insects to it's spores. #mushrooms #fungi #mycology




Visitor Sightings

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Location: Fairview Twp., Cass County

Luminescent Panellus  
  Honey Fae (Farah)
May 2020

Location: Hennepin County

Bioluminescent species!

Luminescent Panellus







Created: 11/29/2022

Last Updated:

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