Russula firmula is a species of mushroom found in Europe and parts of Asia that has dark red-purple to red-brown cap. It is one of about 750 species in the genus Russula, which is distributed worldwide. Together with R. rubra, R. rutila and R. veternos, it was placed in the Rubrinae clade in 2017. [1]

Russula firmula
Exemplar in Bavaria, Germany
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Russulales
Family: Russulaceae
Genus: Russula
Species:
R. firmula
Binomial name
Russula firmula
Jul. Schäff.
Distribution of Russula firmula in Europe and Asia
Russula firmula
View the Mycomorphbox template that generates the following list
Gills on hymenium
Stipe is bare
Spore print is yellow
Ecology is mycorrhizal
Edibility is unknown

Description

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Russula firmula has a yellow spore print. Its spores measure about 8.4 by 7 μm and have .8-1.2 μm high spines. Its pileocystidia measure around 72.5 by 10.3 μm. There are incrustations on its pileocystidia which stain bright pink after about 30 minutes in sulphovanillin, in contrast with the rest of the pileocystidia which stain black. The terminal cells at the cap margins are cylindrical, though tapered narrowly at one end. The basidia are around 46 by 12.8 μm. [1]

Ecology

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It is ectomycorrhizal with conifers, particularly spruce trees. It has a bitter taste.[1]

References

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  1. ^ a b c Caboň, Miroslav; Eberhardt, Ursula; Looney, Brian; Hampe, Felix; Kolařík, Miroslav; Jančovičová, Soňa; Verbeken, Annemieke; Adamčík, Slavomír (September 2017). "New insights in Russula subsect. Rubrinae: phylogeny and the quest for synapomorphic characters". Mycological Progress. 16 (9): 877–892. doi:10.1007/s11557-017-1322-0. ISSN 1617-416X.