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Rufous milkcap

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The rufous milkcap, Lactarius rufus, is a tree-associated milkcap of northern and eastern Europe whose acrid latex makes it a conditional food, traditionally processed and not eaten raw.

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Two whole rusty-brown mushrooms and two lengthwise halves display cream flesh and buff gills on a warm ivory surface.

Identity and naming

Lactarius rufus is a milkcap of the family Russulaceae. Its common name in the catalogue is rufous milkcap, and the catalogue records no other alias. The sources read for this page agree on one identifying feature, the taste of the latex: the milk is intensely acrid, and one source describes it as among the hottest of all mushrooms. It starts mild and becomes very hot within about a minute.

Milkcaps are a difficult genus to identify from one feature, and the rufous milkcap is recognised mainly by its acrid milk and the trees it grows with. The catalogue treats the record as a condition for individual checking, not as a confirmed identification.

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Ecology and habitat

The catalogue records Lactarius rufus as a tree-associated mycorrhizal fungus, supplied from the wild. An iNaturalist Canada entry describes it as growing with pine or birch trees.

The catalogue places the species in northern and eastern Europe. First Nature reports that it has been harvested commercially in Scandinavia and Russia for many years.

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Traditional processing

The catalogue describes the food use as a traditionally processed salted mushroom, and records that the raw fruit body is acrid and that a specific pretreatment is needed in the traditions that accept it. This page is not a preparation recipe.

First Nature notes that the mushroom is sometimes dried and powdered after thorough cooking, and used as a seasoning. A Finnish-focused blog reports a ten-minute boil before cooking, attributed to Finnish guidance. The page does not adopt that instruction, because the blog does not give a primary source and the time and method are not confirmed by an official text read here.

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Edibility status

The sources disagree on edibility. California Fungi lists the species as inedible and very acrid. Wikipedia says it is suspected of being poisonous but has some regional culinary uses. First Nature reports that most western field guides and culinary sources class it as inedible. iNaturalist Canada describes it as edible.

The sources do not establish a safe preparation that works for most people. The honest record is a conflict between regional food tradition and field-guide advice, and this page records that conflict without resolving it.

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Safety and identification

Safety wording: this page describes what the sources record. It is not an identification guide and it gives no verdict that Lactarius rufus is safe to eat. Its acrid raw taste is a warning, not a test of safety. The catalogue states that the condition for this record is individual checking.

Anyone who wants to try a milkcap must have the specimen identified by a qualified expert and must follow a documented local tradition. Eating a raw or undercooked specimen is not recorded here as acceptable.

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Places

Scandinavia

Documented use · Region evidence

Commercial harvest recorded by First Nature; no locality given.

See Scandinaviaon the mapLocation source 1 →

Russia

Documented use · Country evidence

Commercial harvest recorded by First Nature; no locality given.

See Russiaon the mapLocation source 1 →

Northern and eastern Europe

Documented use · Region evidence

Regional range recorded in the catalogue.

See Northern and eastern Europeon the mapLocation source 1 →

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