1
Observations
1 year ago
Last Observed
Russula betularum is a small, very pale member of the Russula (brittlegills) genus of mushrooms. It is usually white to very pale pink, inedible, and grows with birch trees. It is commonly known as the birch brittlegill.
Source: Wikipedia
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Distribution
Common and widespread
Habitat
On poor, damp soils under Betula
Associates
Betula
Conservation
LC
Cap
Very fragile
| Colour | |
|---|---|
| Shape | Convex, Flattened |
| Surface | Smooth |
| Width | 2 - 5 cm |
| Margin | Sulcate |
| Peeling | 19/20 |
Gills
Margin even to slightly crenulate
| Colour | |
|---|---|
| Spacing | distant |
| Edge | irregular |
Flesh
| Colour | |
|---|---|
| Odour | Nil to slightly coconut |
| Taste | Hot to very hot |
Stem
Very fragile, slender
| Colour | |
|---|---|
| Texture | Smooth |
| Shape | Clavate |
Macrochemicals
Guaiac slow and weak blue
| FeSO4 | |
|---|---|
| Guaiac |
Spores
Warts 0.5 - 0.8μm, with well developed network
| Colour | |
|---|---|
| Shape | Subglobose |
| Ornamentation | Warty |
| Size | 8.5-10.5 x 7-8.5 μm |
Microscopic Features
Dermatocystidia numerous, elongate-clavate 5-10μm wide, 0-2 septate
| Dermatocystidia | Club-shaped (Clavate), Septate |
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Confirmed
Unconfirmed
Classification
- ↳ Phylum: Basidiomycota
- ↳ Subphylum: Agaricomycotina
- ↳ Class: Agaricomycetes
- ↳ Order: Russulales
- ↳ Family: Russulaceae
- ↳ Genus: Russula
Synonyms
- Russula emetica sensu auct. mult. p.p.
- Russula emetica var. betularum (Hora) Romagn.
- Russula fragilis sensu Pearson & Dennis (1948)
Reference Sources
T. Læssøe, J. H. Peterson (2019) Fungi of Temperate Europe Vol. 1. Princeton University Press.
G. Kibby (2021) The Genus Russula in Great Britain. Geoffrey Kibby.
