Greasy green brittlegill or Greencracked brittlegill
How they differ, how to recognize them and which is more dangerous — a mushroom comparison
The short answer
Greasy green brittlegill and Greencracked brittlegill are similar species that can be mixed up while foraging. The main visible difference: use: Greasy green brittlegill — cook fresh, pickling, drying, Greencracked brittlegill — culinary, cook fresh, salting. The mushrooms also differ in the following features: cap color, cap shape, cap surface.

Greasy green brittlegill
Russula heterophylla

Greencracked brittlegill
Russula virescens
📊 Comparing characteristics
| Characteristic | Greasy green brittlegill | Greencracked brittlegill |
|---|---|---|
| Edibility class | Greasy green brittlegill Edible | Greencracked brittlegill Edible |
| Season | Greasy green brittlegill SummerAutumn | Greencracked brittlegill SummerAutumn |
| Use | Greasy green brittlegill Cook freshPicklingDrying | Greencracked brittlegill CulinaryCook freshSalting |
| Size | Greasy green brittlegill Medium (5–15 cm) | Greencracked brittlegill Medium (5–15 cm) |
| Cap color | Greasy green brittlegill OliveBrown | Greencracked brittlegill GreenOlive |
| Cap shape | Greasy green brittlegill Depressed | Greencracked brittlegill ConvexFlatConcave |
| Cap surface | Greasy green brittlegill Smooth | Greencracked brittlegill Dry |
| Taste | Greasy green brittlegill Mild | Greencracked brittlegill Mild |
| Smell | Greasy green brittlegill Pleasant | Greencracked brittlegill Pleasant, mushroomy |
| Flesh color change | Greasy green brittlegill Reddening | Greencracked brittlegill No change |
| Hymenophore | Greasy green brittlegill Gilled | Greencracked brittlegill Gilled |
| Stem | Greasy green brittlegill Central | Greencracked brittlegill CentralSolid |
| Ring (veil) | Greasy green brittlegill No ring | Greencracked brittlegill No ring |
| Volva | Greasy green brittlegill No volva | Greencracked brittlegill No volva |
| Substrate | Greasy green brittlegill Soil | Greencracked brittlegill Soil |
| Nutrition type | Greasy green brittlegill Mycorrhizal | Greencracked brittlegill Mycorrhizal |
| Partner trees | Greasy green brittlegill OakBeechHornbeamBirch | Greencracked brittlegill OakBirch |
📅 Seasonality
Greasy green brittlegill
Fruiting season
July – October
Greencracked brittlegill
Fruiting season
June – September
🔬 Morphology
Cap
Greasy green brittlegill
Cap 5-12 cm across, when young convex with an inrolled margin, with age becoming flattened with a slightly depressed center. The cap skin is smooth, slimy in wet weather, dry and matte in dry weather, peels easily 2/3 of the way to the center. Color green-olive, olive-gray, gray-brown, deeper in the center to dark green. Mature caps have fine radial grooves at the margin.
Greencracked brittlegill
Cap 5–15 cm across, spherical in young mushrooms, then flat or slightly depressed. The surface is matte, dry, cracked into small polygonal patches — a characteristic “mosaic” pattern. Color green, grayish green, sometimes with yellowish or grayish zones. The margin is blunt.
Hymenophore
Greasy green brittlegill
Gilled hymenophore — gills adnate or free from the stem, moderately crowded, thin, with characteristic forking near the stem — a diagnostic trait. Color pure white to creamy white. Spore print white.
Greencracked brittlegill
Gills crowded, even, brittle, white. They don't change color when damaged. Spore print white. The gills snap easily under your finger — the brittleness typical of the genus Russula.
Stem
Greasy green brittlegill
Stem 4-8 cm tall, 1.5-2.5 cm thick, firm, cylindrical, hollow in old specimens. Color white to cream, with faint gray-cream patches in old specimens. Surface smooth with fine lengthwise wrinkles. No ring, no volva.
Greencracked brittlegill
Stem 4–10 cm tall, 1.5–3 cm thick, firm, evenly cylindrical or slightly narrowing toward the base. The surface is white, smooth or slightly wrinkled. No ring and no volva — an important safety feature.
Flesh
Greasy green brittlegill
Flesh firm, brittle, white, turns faintly pink when damaged — a reaction typical of the species. Smell faint, pleasant, fruity-mushroomy, taste mild, sweetish and nutty, not bitter (tongue test).
Greencracked brittlegill
Flesh firm, white, crunchy, crumbles easily — the so-called “brittlegill” brittleness. It doesn't change color when damaged and releases no milk. The taste is mild and nutty, without bitterness — one of the few brittlegills that can be eaten raw without danger.
Smell
Greasy green brittlegill
Faint, pleasant, fruity-mushroomy, neutral-sweetish.
Greencracked brittlegill
Smell unobtrusive, pleasant, faintly nutty. It lacks the sharp or unpleasant notes typical of some poisonous brittlegills. When cooked, the aroma grows stronger, taking on warm woodland notes.
📍 Habitats
Greasy green brittlegill
Greencracked brittlegill
👀 Similar mushrooms — don't mix them up!
❓ Frequently asked questions
Can Greasy green brittlegill and Greencracked brittlegill be mixed up?
How to tell Greasy green brittlegill from Greencracked brittlegill?
Is Greencracked brittlegill edible?
When do Greasy green brittlegill and Greencracked brittlegill grow?
Sources
- [1]Вікіпедія (українська)
- [2]Атлас грибів України, Зеров Д.К. (1979)
- [3]MycoBank Database
- [4]Index Fungorum
- [5]GBIF
- [6]iNaturalist Ukraine