20/Aug/23, 3:59 PM
Raudoja, Harju County
Mixed forest (birch, pine, spruce), in moss near forest road
59°22'43.5"N 25°29'11.6"E (59.378757, 25.486559)
🔆 Fair weather with slight overcast
Original Instagram postRussula fragilis
Fragile Brittlegill
- Scientific identification
- Russula fragilis Fr.
- Family
- Russulaceae
- Class
- Agaricomycetes
- Genus
- Russula
Names across languages
- English: Fragile Brittlegill
- German: Wechselfarbiger Spei-Täubling
- Estonian: Habras pilvik
- Russian: Сыроежка ломкая
The scientific profile
From the latest record: 2023-08-20.
Hymenium
Gills are adnate to free, quite brittle, white to cream in color.
Cap
2-6 cm in diameter, initially convex, flattening out with age; can be variable in color but generally red to purplish-red.
Hymenium Attachment
Adnate to almost free from the stipe.
Stipe
3-8 cm long, 1-2 cm thick; white, often developing reddish spots or zones.
Fruit body
5-14 cm tall.
Spore print
Spore Print: White to cream.
Ecology
Mycorrhizal, most commonly found in coniferous and mixed forests.
Edibility
Inedible; known to cause gastrointestinal distress.
Microscopy
Spores 6-9 x 5-7 µm, elliptical, with warts.
Odour
Mild or not distinctive.
Overview
Russula fragilis exhibits a relatively high level of spore ornamentation, featuring warts that are isolated or only infrequently connected by lines. The gills of this species contain predominantly 4-spored basidia, contributing to its overall spore density. Additionally, it possesses intracellular pigments, which result in its vivid cap colors. This species is noted for its sensitivity to environmental conditions, particularly soil pH, favoring more acidic substrates. It is subject to parasitization by the fungus Hypomyces lactifluorum, which transforms it into the "Lobster Mushroom." Studies have shown that Russula fragilis has a high degree of mycorrhizal specificity, most commonly forming associations with members of the Pinaceae family.
1838). Epicr. Syst. Mycol. (Upsaliae): 359 (’1836-1838′).
Field encounters
Source hashtags
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