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Summer bolete or Bronze bolete

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

The short answer

Summer bolete and Bronze bolete are similar species that can be mixed up while foraging. The main visible difference: season: Summer bolete — spring, summer, autumn, Bronze bolete — summer, autumn. The mushrooms also differ in the following features: use, cap color, cap surface.

Five summer boletes (Boletus reticulatus) in oak leaf and pine needle litter, with brown caps and thick pale stems

Summer bolete

Boletus reticulatus

EdibleExpert-verified
Bronze bolete (Boletus aereus) in oak leaves and grass, with a dark brown cap, bright yellow pores and a brown stem

Bronze bolete

Boletus aereus

EdibleExpert-verified

📊 Comparing characteristics

Comparison of characteristics: Summer bolete and Bronze bolete
Edibility class

Summer bolete

Edible

Bronze bolete

Edible
Season

Summer bolete

SpringSummerAutumn

Bronze bolete

SummerAutumn
Use

Summer bolete

Cook freshDryingPicklingSalting

Bronze bolete

Not eaten
Size

Summer bolete

Large (over 15 cm)

Bronze bolete

Large (over 15 cm)
Cap color

Summer bolete

BrownOrange

Bronze bolete

BrownDark brown
Cap shape

Summer bolete

Convex

Bronze bolete

Convex
Cap surface

Summer bolete

Cracked

Bronze bolete

Smooth
Taste

Summer bolete

Mild

Bronze bolete

Mild
Smell

Summer bolete

Pleasant

Bronze bolete

Pleasant
Flesh color change

Summer bolete

No change

Bronze bolete

No change
Hymenophore

Summer bolete

Pored

Bronze bolete

Pored
Stem

Summer bolete

Bulbous

Bronze bolete

Bulbous
Ring (veil)

Summer bolete

No ring

Bronze bolete

No ring
Volva

Summer bolete

No volva

Bronze bolete

No volva
Substrate

Summer bolete

Soil

Bronze bolete

Soil
Nutrition type

Summer bolete

Mycorrhizal

Bronze bolete

Mycorrhizal
Partner trees

Summer bolete

OakBeechHornbeam

Bronze bolete

OakBeechHornbeam

📅 Seasonality

Summer bolete

Fruiting season

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

May – October

Bronze bolete

Fruiting season

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

June – October

🔬 Morphology

Cap

Summer bolete

Cap 8–25 cm (sometimes up to 30), hemispherical in young mushrooms, then cushion-shaped, almost flat in old ones. Color warm bronze-brown, light brown, darker in the center. The surface is matte, slightly tacky in wet weather. A characteristic feature: in mature mushrooms the cap becomes covered with a fine network of cracks — a “crackled” look, like fired clay.

Bronze bolete

Cap 5–20 cm, hemispherical in young mushrooms, then cushion-shaped. Color dark — from bronze-olive to chocolate brown, sometimes almost blackish brown. Surface matte, slightly fibrous or finely cracked in dry weather. In old mushrooms it may fade noticeably.

Hymenophore

Summer bolete

Tubes free or notched at the stem. White when young, then yellowish, olive-green in mature mushrooms. Pores small and round. Does NOT turn blue when pressed — a key feature.

Bronze bolete

Hymenophore tubular, free or slightly notched at the stem. White at first, then yellowish, olive-yellow in mature mushrooms. Pores small and round. Key feature: it does NOT turn blue when pressed or cut — this sets it apart from many potentially dangerous boletes.

Stem

Summer bolete

Stem 10–25 cm tall, 2–7 cm thick, club-shaped in young mushrooms, cylindrical in adults. Color light brown, cream. The most characteristic feature: the whole stem is covered with a distinct white network — broad, coarse, easy to see (hence the Latin “reticulatus,” meaning “net-like”). This is the main difference from the other porcini.

Bronze bolete

Stem 5–13 cm tall, 2–4 cm thick, bulbous or club-shaped, cylindrical in old mushrooms. Color chestnut brown, darker than the cap. Along its whole length runs a fine brown net, close to the stem in colour and usually more distinct near the top. This is a hallmark feature of porcini.

Flesh

Summer bolete

Flesh white, dense, does NOT change color when cut. Fibrous texture, with a pleasant resistance under the knife. It gets maggoty about as often as the classic porcini — and a bit less readily than the bronze bolete.

Bronze bolete

Flesh white, very firm, does NOT change color when cut. This is an important diagnostic feature — in lookalikes (for example, the bitter bolete) the flesh turns pinkish. The texture is like a nicely mature porcini: fibrous, with a pleasant resistance when you slice it.

Smell

Summer bolete

Smell rich and mushroomy, with nutty notes, stronger in young mushrooms. Taste mild, slightly sweet, not bitter. Dried, it keeps its aroma well.

Bronze bolete

Smell richly mushroomy, with nutty notes, in some specimens stronger than in ordinary porcini. Taste mild, sweetish, with no bitterness.

📍 Habitats

Summer bolete

Deciduous forestMixed forest

Bronze bolete

Deciduous forest

👀 Similar mushrooms — don't mix them up!

❓ Frequently asked questions

Can Summer bolete and Bronze bolete be mixed up?
Yes, they look so similar that people often mix them up. The season, use, cap color help tell them apart.
How to tell Summer bolete from Bronze bolete?
The main differences: season: Summer bolete — spring, summer, autumn, Bronze bolete — summer, autumn; use: Summer bolete — cook fresh, drying, pickling, salting, Bronze bolete — not eaten; cap color: Summer bolete — brown, orange, Bronze bolete — brown, dark brown. The full table of characteristics is higher up on this page.
Is Bronze bolete edible?
Bronze bolete — edible.
When do Summer bolete and Bronze bolete grow?
Summer bolete — May–October; Bronze bolete — June–October.

Sources

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