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.

Summer bolete
Boletus reticulatus

Bronze bolete
Boletus aereus
📊 Comparing characteristics
| Characteristic | Summer bolete | 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
May – October
Bronze bolete
Fruiting season
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
Bronze bolete
👀 Similar mushrooms — don't mix them up!
❓ Frequently asked questions
Can Summer bolete and Bronze bolete be mixed up?
How to tell Summer bolete from Bronze bolete?
Is Bronze bolete edible?
When do Summer bolete and Bronze bolete grow?
Sources
- [1]Вікіпедія (українська)
- [2]Атлас грибів України, Зеров Д.К. (1979)
- [3]MycoBank Database
- [4]Index Fungorum
- [5]GBIF
- [6]iNaturalist Ukraine