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Gaping Panellus (Panellus ringens)

Панеллюс зевающий
Current name

Index Fungorum    Panellus ringens (Fr.) Romagn.
MycoBank    Panellus ringens (Fr.) Romagn.

Other names

Gaping Panellus, open Panus.

Systematic position
Specific epithet etymology

ringens, a, um — gaping-mouthed, baring teeth; yawning. Pres. act. participle of ringor, rictus sum, ringi — to gape, to bare teeth.

Synonyms

Panus ringens (Fr.) Fr., Hymenomycetes europaei: 490 (1874) 

Lentinus ringens (Fr.) Fr., Synopsis generis Lentinorum: 14 (1836)

Pocillaria ringens (Fr.) Kuntze, Revisio generum plantarum 3 (3): 506 (1898) 

General description

The English common name for this mushroom is "winter oysterling."

Habit
Fruiting body
Agaricoid (cap and stipe)
Sessile, bracket-shaped, hoof-shaped, or as an irregular crust/rosette
Hymenophore
Lamellate (gills present, including folded or rudimentary)
Fruiting period (list)
MarMarch (1st–10th)March (11th–20th)March (21st–31st)AprApril (1st–10th)OctOctober (1st–10th)October (11th–20th)October (21st–31st)NovNovember (1st–10th)November (11th–20th)November (21st–30th)
Mushroom cap

0.5–2 cm, initially bell-shaped to nest-like with an incurved margin, then laterally attached, with a short stipe attached to the top of the cap, with a thin radially striate, sometimes wrinkled margin; thin-fleshed, almost translucent, matte, with a whitish bloom or finely hairy, white-pubescent at the base (a characteristic feature); initially pinkish-gray with a violet tint, white-pink-lilac, darker toward the margin, yellowish or whitish at the base, later reddish-brown, red-brown with a lighter margin; in dry weather — pale, in moist conditions — lilac-brown.
Gills radiating from the point of attachment of the basidiome, narrow, sometimes forked without anastomoses, well separated from each other, ranging from grayish-pink to wine-brown and reddish-brown.

Stem

Short, 0.2–0.4 cm long and about 0.3 cm in diameter, lateral, attached to the top of the cap (a characteristic feature), yellowish, grayish, with white pubescence.

Flesh

Thin, dense, gray-lilac; taste indistinct.

Odor

Weak, indistinct.

Microscopy

Spore print: white. Spores cylindrical, narrowly cylindrical, allantoid, smooth, colorless.

Ecology and distribution

Grows singly or in small clusters on decaying hardwood. Prefers Populus, Betula, common bird cherry (Prunus padus), as well as Salix and alder as substrates. A rare species. Requires high humidity. Fairly widespread in the Northern Hemisphere.

Fruiting

October–March

Nutritional properties
Edibility unknown

Culinary properties unknown.

Conservation status
Not listed in the Red Data Book of the Russian Federation or its regional Red Lists.
Similar species

Similar to the late-autumn Panellus violaceofulvus, which grows on coniferous wood.

Notes

A species considered rare everywhere, but as it seems to us, the matter is entirely due to its small size, substrate specialization, and the timing of fruiting body formation.

Link to this page for printed editions
Shipovalov A.G. Gaping Panellus (Panellus ringens) - Mushrooms of Vologda Region [Electronic resource] URL: https://xn----7sbancweblffgklubds60aja.xn--p1ai/en/gaping-panellus-panellus-ringens (accessed: 13.04.2026).
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