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Orange webcap or Cortinarius multiformis

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

The short answer

Orange webcap and Cortinarius multiformis are similar species that can be mixed up while foraging. The main visible difference: cap color: Orange webcap — brown, dark brown, Cortinarius multiformis — yellow, orange, brown. The mushrooms also differ in the following features: cap surface, stem, partner trees.

Orange webcap (Cortinarius mucosus)

Orange webcap

Cortinarius mucosus

InedibleExpert-verified

📊 Comparing characteristics

Comparison of characteristics: Orange webcap and Cortinarius multiformis
Edibility class

Orange webcap

Inedible

Cortinarius multiformis

Inedible
Season

Orange webcap

SummerAutumn

Cortinarius multiformis

SummerAutumn
Use

Orange webcap

Not eaten

Cortinarius multiformis

Not eaten
Size

Orange webcap

Medium (5–15 cm)

Cortinarius multiformis

Medium (5–15 cm)
Cap color

Orange webcap

BrownDark brown

Cortinarius multiformis

YellowOrangeBrown
Cap shape

Orange webcap

Convex

Cortinarius multiformis

Convex
Cap surface

Orange webcap

Slimy

Cortinarius multiformis

Smooth
Taste

Orange webcap

Unknown

Cortinarius multiformis

Unknown
Smell

Orange webcap

Odorless

Cortinarius multiformis

Odorless
Flesh color change

Orange webcap

No change

Cortinarius multiformis

No change
Hymenophore

Orange webcap

Gilled

Cortinarius multiformis

Gilled
Stem

Orange webcap

Central

Cortinarius multiformis

Bulbous
Ring (veil)

Orange webcap

Ring remnants

Cortinarius multiformis

Ring remnants
Volva

Orange webcap

No volva

Cortinarius multiformis

No volva
Substrate

Orange webcap

Soil

Cortinarius multiformis

Soil
Nutrition type

Orange webcap

Mycorrhizal

Cortinarius multiformis

Mycorrhizal
Partner trees

Orange webcap

Pine

Cortinarius multiformis

BeechOakHornbeamBirch

📅 Seasonality

Orange webcap

Fruiting season

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

August – October

Cortinarius multiformis

Fruiting season

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

August – October

🔬 Morphology

Cap

Orange webcap

The cap is 5-10 cm across, hemispherical with an inrolled margin in young mushrooms, becoming convex to flat over time. The color is chestnut-brown, honey-brown, darker in the center, paler at the margin. The surface is very slimy in wet weather — a hallmark of the species. The cap skin peels off easily, as in a slippery jack. In dry weather the cap is simply shiny, without noticeable slime.

Cortinarius multiformis

The cap is 5-10 cm across, hemispherical with an inrolled margin in young mushrooms, becoming convex to flat with a low umbo over time. The color is orange-yellow, honey-ochre, reddish-yellow, darker when young, fading to pale ochre with age. The surface is smooth, slightly slimy in wet weather. Older mushrooms often show fine radial cracks.

Hymenophore

Orange webcap

The hymenophore is gilled — the gills are attached to the stem and moderately crowded. In young mushrooms they are pale cream to pale ochre, later turning rusty brown as the spores ripen. The spore print is rusty brown — a diagnostic feature of the genus Cortinarius. In young mushrooms the gills are covered by a cobwebby partial veil (the cortina).

Cortinarius multiformis

The hymenophore is gilled — the gills are attached to the stem and moderately crowded. In young mushrooms they are pale cream to pale ochre, later turning rusty brown as the spores ripen. The spore print is rusty brown. In young mushrooms the gills are covered by a cobwebby partial veil (the cortina).

Stem

Orange webcap

The stem is 6-12 cm tall, 1-2 cm thick, cylindrical, long, often tapering toward the base. The color is whitish to cream, with reddish tints toward the base. The surface is smooth, slimy in the upper part, with fine lengthwise fibers. On the stem, remnants of the cobwebby cortina form a thin band dusted with rusty-brown spores.

Cortinarius multiformis

The stem is 5-9 cm tall, 1-2 cm thick, cylindrical, with a pronounced bulbous base (like an onion bulb). The color is whitish to pale ochre. On the stem you'll see remnants of the cobwebby cortina dusted with rusty-brown spores.

Flesh

Orange webcap

The flesh is firm, white to cream. When cut it does not change color. The smell is faint and neutral, with no distinctive notes.

Cortinarius multiformis

The flesh is firm, white to pale cream. When cut it does not change color or turns slightly yellow. The smell is faint and neutral.

Smell

Orange webcap

Faint, neutral, mushroomy, with no pronounced notes.

Cortinarius multiformis

Faint, neutral, mushroomy, with no distinctive notes.

📍 Habitats

Orange webcap

Conifer forestMixed forest

Cortinarius multiformis

Deciduous forestMixed forest

👀 Similar mushrooms — don't mix them up!

❓ Frequently asked questions

Can Orange webcap and Cortinarius multiformis be mixed up?
Yes, they look so similar that people often mix them up. The cap color, cap surface, stem help tell them apart.
How to tell Orange webcap from Cortinarius multiformis?
The main differences: cap color: Orange webcap — brown, dark brown, Cortinarius multiformis — yellow, orange, brown; cap surface: Orange webcap — slimy, Cortinarius multiformis — smooth; stem: Orange webcap — central, Cortinarius multiformis — bulbous. The full table of characteristics is higher up on this page.
Is Cortinarius multiformis edible?
Cortinarius multiformis — inedible.
When do Orange webcap and Cortinarius multiformis grow?
Orange webcap — August–October; Cortinarius multiformis — August–October. Their seasons overlap, so be especially careful.

Sources

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