Lactarius vietus
| Lactarius vietus | |
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| Scientific classification | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Russulales |
| Family: | Russulaceae |
| Genus: | Lactarius |
| Species: | L. vietus |
| Binomial name | |
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Lactarius vietus (Fr.) Fr. (1838) |
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| Synonyms | |
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| Lactarius vietus | |
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| Mycological characteristics | |
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gills on hymenium |
 
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cap is convex or infundibuliform |
 
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hymenium is decurrent or adnate |
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stipe is bare |
 
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spore print is white to yellow |
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ecology is mycorrhizal |
 
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edibility: inedible or edible |
cap is convex
hymenium is decurrent
spore print is white
edibility: inedible
Lactarius vietus (commonly known as the grey milkcap) is a species of fungus in the family Russulaceae, first described by Elias Magnus Fries. It produces moderately sized and brittle mushrooms, which grow on the forest floor or on rotting wood. The flattened-convex cap can vary in shape, sometimes forming the shape of a wide funnel. It is typically grey, but the colour varies. The species has crowded, light-coloured gills, which produce white milk. The spore print is typically whitish, but also varies considerably. The mushrooms typically have a strong, acrid taste and have been described as inedible, but other authors have described them as consumable after boiling. L. vietus feeds by forming an ectomycorrhizal relationship with surrounding trees, and it favours birch. It grows in autumn months and is fairly common in Europe, North America and eastern Asia.
Lactarius vietus was first described by Elias Magnus Fries in 1821 as Agaricus vietus in his Systema Mycologicum. In his 1838 work Epicrisis systematis mycologici, Fries reclassified the species as a Lactarius, giving it its current name. Subsequent attempts to reclassify the species have been unsuccessful. In his 1871 work Der Führer in die Pilzkunde, Paul Kummer reclassified the species as a member of Galorrheus, and in Otto Kuntze's 1891 Revisio generum plantarum, the species was placed in the genus Lactifluus. Both Galorrheus vietus and Lactifluus vietus are now considered obligate synonyms (different names for the same species based on one type) of Lactarius vietus. The specific epithet is from the Latin , meaning shrunken. It is commonly known as the grey milkcap.
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