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Orange peel fungus or Golden cup

How they differ, how to recognize them and which is more dangerous — a mushroom comparison

The short answer

Orange peel fungus and Golden cup are similar species: Orange peel fungus is conditionally edible, while Golden cup is inedible. The main visible difference: season: Orange peel fungus — summer, autumn, winter, Golden cup — spring. The mushrooms also differ in the following features: use, size, cap color.

Orange peel fungus (Aleuria aurantia)

Orange peel fungus

Aleuria aurantia

Conditionally edibleExpert-verified
Golden cup (Caloscypha fulgens)

Golden cup

Caloscypha fulgens

InedibleExpert-verified

📊 Comparing characteristics

Comparison of characteristics: Orange peel fungus and Golden cup
Edibility class

Orange peel fungus

Conditionally edible

Golden cup

Inedible
Season

Orange peel fungus

SummerAutumnWinter

Golden cup

Spring
Use

Orange peel fungus

Cook fresh

Golden cup

Not eaten
Size

Orange peel fungus

Small (up to 5 cm)

Golden cup

Very small (<3 cm)
Cap color

Orange peel fungus

Orange

Golden cup

OrangeYellow
Cap shape

Orange peel fungus

Depressed

Golden cup

Depressed
Cap surface

Orange peel fungus

Smooth

Golden cup

Smooth
Taste

Orange peel fungus

Mild

Golden cup

Unknown
Smell

Orange peel fungus

Odorless

Golden cup

Odorless
Flesh color change

Orange peel fungus

No change

Golden cup

No change
Hymenophore

Orange peel fungus

Smooth

Golden cup

Smooth
Stem

Orange peel fungus

Absent

Golden cup

Absent
Ring (veil)

Orange peel fungus

No ring

Golden cup

No ring
Volva

Orange peel fungus

No volva

Golden cup

No volva
Substrate

Orange peel fungus

SoilForest litter

Golden cup

SoilMossForest litterDead wood
Nutrition type

Orange peel fungus

Saprotroph

Golden cup

Saprotroph
Partner trees

Orange peel fungus

—

Golden cup

SpruceFirPine

📅 Seasonality

Orange peel fungus

Fruiting season

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

August – December

Golden cup

Fruiting season

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

April – June

🔬 Morphology

Cap

Orange peel fungus

The fruiting body is cup-shaped, irregular, 2–10 cm across (sometimes up to 12). When young it is closed and globular; as it grows it opens, first into a deep cup, then becomes saucer-shaped, and in old age it crumples and curls at the edges. The inner surface is bright orange, smooth and shiny. The outer surface is paler, pale yellowish-orange, finely granular.

Golden cup

The fruiting body is cup- or goblet-shaped, 1-3 cm across and 0.5-1.5 cm tall, with no clear division into cap and stem. The inner surface (hymenium) is smooth, silky-shiny, bright orange to flame-yellow. The outer surface is paler, creamy orange, with fine whitish down. The rim of the cup is thin, curled downward in young specimens and flattening out or slightly wavy in mature ones.

Hymenophore

Orange peel fungus

The spore-bearing layer lines the inner, concave surface of the cup. Cup fungi have no gills or tubes — spores form in asci directly on the surface. Spore print white.

Golden cup

A smooth hymenium covers the inner surface of the cup. The spores ripen in microscopic sacs (asci). The spore print is colorless to pale yellow. The spores are shot out at the slightest change in air pressure or moisture — a trait shared by all Pezizales.

Stem

Orange peel fungus

There is no stem, or it is very short, a small bump at the base of the cup. The fruiting body sits directly or almost directly on the soil.

Golden cup

The stem is almost absent — the fruiting body is sessile or has a short, narrowed base 2-5 mm tall, barely sunk into the soil.

Flesh

Orange peel fungus

The flesh is thin, waxy-brittle, orange or paler than the outer surface. Very fragile — it falls apart at the slightest pressure.

Golden cup

The flesh is thin (1-2 mm), waxy, brittle and orange-yellowish. It doesn't change color when cut. No distinct smell or taste.

Smell

Orange peel fungus

The smell is faint, neutral or slightly sweetish, with no distinct notes. The taste is mild, bland, not bitter.

Golden cup

Faint, neutral, indistinct. Not tasted — the mushroom is inedible.

📍 Habitats

Orange peel fungus

Deciduous forestMixed forestConifer forest

Golden cup

Conifer forestMixed forest

👀 Similar mushrooms — don't mix them up!

❓ Frequently asked questions

Can Orange peel fungus and Golden cup be mixed up?
Yes, they look so similar that people often mix them up. The season, use, size help tell them apart.
How to tell Orange peel fungus from Golden cup?
The main differences: season: Orange peel fungus — summer, autumn, winter, Golden cup — spring; use: Orange peel fungus — cook fresh, Golden cup — not eaten; size: Orange peel fungus — small (up to 5 cm), Golden cup — very small (<3 cm). As for edibility: Orange peel fungus is conditionally edible, Golden cup is inedible. The full table of characteristics is higher up on this page.
Is Golden cup edible?
Golden cup — inedible.
When do Orange peel fungus and Golden cup grow?
Orange peel fungus — August–December; Golden cup — April–June.

Sources

  • [1]Вікіпедія (українська)
  • [2]Атлас грибів України, Зеров Д.К. (1979)
  • [3]MycoBank Database
  • [4]Index Fungorum
  • [5]GBIF
  • [6]iNaturalist Ukraine