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Larch bolete or Rosy spike

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

The short answer

Larch bolete and Rosy spike are similar species that can be mixed up while foraging. The main visible difference: use: Larch bolete — cook fresh, pickling, drying, salting, Rosy spike — cook fresh, pickling. The mushrooms also differ in the following features: size, cap color, hymenophore.

A whole larch bolete (Suillus grevillei) in hand, side view: yellow pores, a dark ring and a pale fibrous stem

Larch bolete

Suillus grevillei

EdibleExpert-verified
Rosy spike (Gomphidius roseus)

Rosy spike

Gomphidius roseus

EdibleExpert-verified

📊 Comparing characteristics

Comparison of characteristics: Larch bolete and Rosy spike
Edibility class

Larch bolete

Edible

Rosy spike

Edible
Season

Larch bolete

SummerAutumn

Rosy spike

SummerAutumn
Use

Larch bolete

Cook freshPicklingDryingSalting

Rosy spike

Cook freshPickling
Size

Larch bolete

Medium (5–15 cm)

Rosy spike

Small (up to 5 cm)
Cap color

Larch bolete

YellowOrange

Rosy spike

PinkRed
Cap shape

Larch bolete

Convex

Rosy spike

Convex
Cap surface

Larch bolete

Slimy

Rosy spike

Slimy
Taste

Larch bolete

Mild

Rosy spike

Mild
Smell

Larch bolete

Pleasant

Rosy spike

Pleasant
Flesh color change

Larch bolete

Reddening

Rosy spike

Reddening
Hymenophore

Larch bolete

Pored

Rosy spike

Gilled
Stem

Larch bolete

Central

Rosy spike

Central
Ring (veil)

Larch bolete

Ring present

Rosy spike

Ring remnants
Volva

Larch bolete

No volva

Rosy spike

No volva
Substrate

Larch bolete

Soil

Rosy spike

Soil
Nutrition type

Larch bolete

Mycorrhizal

Rosy spike

Parasite
Partner trees

Larch bolete

Larch

Rosy spike

PineSpruce

📅 Seasonality

Larch bolete

Fruiting season

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

June – October

Rosy spike

Fruiting season

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

August – October

🔬 Morphology

Cap

Larch bolete

Cap 4–10 cm (sometimes up to 15), hemispherical in young mushrooms, then cushion-shaped, almost flat in old ones. Color bright yellow, lemon-yellow, golden-orange, less often rusty brown. The surface is very sticky and shiny — in wet weather it looks literally lacquered. The skin peels off easily and often stretches into strips.

Rosy spike

Cap 2-6 cm across; hemispherical with an inrolled margin when young, later convex to flat with a shallow central depression. Color bright pink, coral-pink, salmon-pink: distinctive and unmatched among the spikes. In old mushrooms it fades to pale pink or ochre-pink. Surface very slimy, sticky; the skin peels off easily.

Hymenophore

Larch bolete

Tubes adnate to the stem at first, then notched. Yellowish when young, later grayish- or olive-yellow. Pores small and angular. When pressed they turn pinkish, then brown — a characteristic reaction. In young mushrooms they are covered by a yellowish membranous veil.

Rosy spike

Gilled hymenophore; gills decurrent, distant, waxy, thick. In young mushrooms whitish, later darkening to gray-black, almost black because of the dark spore print. Spore print dark brown to black. Decurrent gills plus darkening are the diagnostic features of the genus Gomphidius.

Stem

Larch bolete

Stem 4–12 cm tall, 1–3 cm thick, cylindrical or slightly widening toward the base. Yellow above, brownish below the ring, with small rusty dots. The ring is white or yellowish, membranous, and breaks down quickly — in mature mushrooms it’s often gone or only a narrow band remains.

Rosy spike

Stem 3-7 cm tall, 0.8-1.5 cm thick, cylindrical, thinner and shorter than in other spikes. Color whitish to pale pink at the top, more intensely pink lower down. A ring zone from the veil in the upper part, faint. The stem base often has whitish mycelium.

Flesh

Larch bolete

Flesh yellow, soft, watery in mature mushrooms. When cut it turns slightly pinkish in the cap, and sometimes a bit greenish in the stem. The texture is slimy-fibrous.

Rosy spike

Flesh thin, whitish to pale pink, soft. When cut it turns slightly wine-pink. Smell faint, pleasantly mushroomy.

Smell

Larch bolete

Smell faint, mushroomy, with a barely noticeable resinous note. Taste mild, not bitter.

Rosy spike

Faint, pleasantly mushroomy, with no distinctive notes.

📍 Habitats

Larch bolete

Conifer forestMixed forest

Rosy spike

Conifer forestMixed forest

👀 Similar mushrooms — don't mix them up!

❓ Frequently asked questions

Can Larch bolete and Rosy spike be mixed up?
Yes, they look so similar that people often mix them up. The use, size, cap color help tell them apart.
How to tell Larch bolete from Rosy spike?
The main differences: use: Larch bolete — cook fresh, pickling, drying, salting, Rosy spike — cook fresh, pickling; size: Larch bolete — medium (5–15 cm), Rosy spike — small (up to 5 cm); cap color: Larch bolete — yellow, orange, Rosy spike — pink, red. The full table of characteristics is higher up on this page.
Is Rosy spike edible?
Rosy spike — edible.
When do Larch bolete and Rosy spike grow?
Larch bolete — June–October; Rosy spike — August–October.

Sources

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