Agrocybe dura
A grassland agaric listed as edible in historical and scientific catalogues for Hong Kong and China. Taxonomic concepts and practical food value vary; the listings do not establish safe identification or culinary practice.
Mushrooms
Dark violet Chinese porcini
Dark violet Chinese porcini, Boletus violaceofuscus, is a Chinese ectomycorrhizal bolete of the porcini section. The 2026 Chinese catalogue lists it as edible, but its culinary use is not documented.
Identity and placement
Boletus violaceofuscus is a bolete from China. It was first described by W. F. Chiu in 1948 and is placed in Boletus section Boletus, the group that includes the European porcini, Boletus edulis.
A Japanese genetic study places the species apart from other members of its section and describes it as clearly distinct in morphology. The same study notes that species within section Boletus are hard to tell apart by appearance alone, so a name on a Chinese market sample should be checked against a voucher.
Food status
The 2026 Chinese catalogue of edible and medicinal fungi lists the species as edible or edible-and-medicinal. The catalogue presents this as a research lead and gives no culinary tradition, preparation or regional name.
Its close relative Boletus subviolaceofuscus is described in the sources as an edible porcini-group bolete. That description does not transfer to this species, and the sources read here give no culinary guidance for it.
Sources for this section
Safety
The catalogue's edibility entry is a research lead and not a safety assessment. The sources read here give no poisoning records or toxicity data for the species.
Because section Boletus contains species that are hard to separate by appearance, identification should be confirmed by a regional expert from a voucher specimen before any wild bolete is eaten.
Places
China
Documented use · Country evidenceThe 2026 Chinese catalogue lists the species as edible or edible-and-medicinal. The catalogue gives no preparation or culinary tradition.
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African Caesar-group mushroom
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Sources
Mycosystema (菌物学报)Food use · Safety
Species cataloging of edible and medicinal fungi in China (中国食药用菌物种编目)Catalogue status: listed as edible or edible-and-medicinal; a research lead, not an independent safety assessment
Cited in: Identity and placement; Food status; Safety
Hokkaido UniversityTaxonomy · Look alikes
Hokkaido University graduate thesis on Boletus section Boletus (Japanese genetic study)The species is genetically distinct and morphologically clear, and sits in section Boletus, whose members are hard to separate by appearance alone
Cited in: Identity and placement; Safety