Black trumpet

A woodland funnel, not a safe picture test

The black trumpet is Craterellus cornucopioides, a wild fungus in the order Cantharellales. It is also called horn of plenty; “black trumpet” describes the dark mature fruit body, while the French and Italian common names include “trumpet of the dead.” The accepted name used here is Craterellus cornucopioides (L.) Pers. IUCN places it in Hydnaceae, though some older and alternative taxonomic sources use Cantharellaceae for Craterellus. Those family treatments differ; they do not change the species name.

The fruit body is a thin-fleshed hollow funnel, usually dark brown to charcoal or black, with a flared irregular rim. The outer fertile surface is grey and smooth or only faintly ridged, rather than carrying the blade-like gills familiar from many mushrooms. Several may emerge together among leaf litter, where their dark colour makes them hard to see. Their trumpet-like shape and hollowness are useful descriptive features, not a complete identification key. Other dark funnel fungi occur, and the names applied to black trumpets can shift with geography and taxonomic concept. A photograph, app label or common name cannot verify an individual wild mushroom.

That distinction matters outside Europe. The IUCN global assessment treats the range as mostly European and says some records outside that range may be misidentifications, other species or introductions. North American and East Asian material may be treated differently under other taxonomic concepts. The broad country list in historical and checklist sources therefore should not be converted into a single verified species range without checking regional specimens and nomenclature.

A partnership beneath the forest floor

Like other ectomycorrhizal fungi, C. cornucopioides lives in a partnership with tree roots: fungal threads extend into the soil and exchange nutrients with the host. Its visible mushrooms are seasonal fruiting bodies of a larger organism that is mostly out of sight. European accounts place it in deciduous and mixed woods, often with beech or oak; some descriptions also report conifer associates. A habitat description is not an exact tree requirement, and the sources do not establish one universal soil type or host.

The mushroom has not entered routine cultivation. The food literature describes wild fruit bodies and some market sales rather than a stable farmed supply. This forest dependence is part of its identity as an ingredient: the raw material varies with woodland, weather and season, and the evidence gathered here does not support a cultivation protocol or a quantitative sustainable-harvest rule.

When it appears

Season is regional. A British and European field guide places fruiting from July to November, from summer into late autumn, and notes groups appearing after autumn rain. A French university mushroom database extends its picking period from July to December, often with late-summer and autumn flushes. The Georgia ethnobiology project records summer and autumn. These accounts overlap around autumn but are not a universal calendar; they should not be used to predict fruiting in China, North America or another climate.

The seasonal mushroom is easy to miss in fallen leaves. The field guide notes that fruit bodies may recur in groups and can become conspicuous once the first is spotted. It does not give a reliable rainfall threshold, temperature trigger or number of days from rain to fruiting, so none is supplied here.

Cooking and preserving

European food accounts value the cooked mushroom for an aromatic, delicate, sweet-earthy flavor. A field guide suggests soups, stews and casseroles and notes that the dark colour remains after cooking. The 2024 review describes fresh fruit bodies being sold in Denmark and dried mushrooms being used as ingredients. Drying concentrates the mushroom into a form suited to storage and later cooking; dried fruit bodies can also be ground into a seasoning flour used in soups and sauces.

The hollow trumpets can trap grit. The field guide advises washing them well before cooking, and cutting larger fruit bodies open before drying so they can be cleaned. These are practical notes from a European culinary field account, not a validated commercial process or shelf-life specification. The Georgian ethnobiology project preserves a more specific regional qualification: its cited account calls the mushroom edible when young and fresh. That statement belongs to the Georgian source tradition; it is not a substitute for expert identification or a universal freshness rule.

The documented culinary uses are cooking, drying and seasoning. No traditional fermentation, brining or curing method for this species was identified in the evidence reviewed. It should not be assigned a fermentation role simply because Fermentea catalogues foods used in fermentation. Laboratory findings about chemical composition or bioactivity do not establish a health treatment, and this ingredient page makes no medical claims.

Geography is not one evidence class

Europe has the clearest combination of ecological, culinary and seasonal descriptions in the sources reviewed. The record is broad and regional, not an atlas of verified populations. Georgia contributes a university ethnobiology page that reports herbarium records across all regions, broad-leaved woodland habitat and summer/autumn fruiting, while citing literature for a young-and-fresh edible note. The page gives no individual collection locality.

The China-scoped 2026 edible-and-medicinal fungi catalogue includes C. cornucopioides. That is a scientific checklist classification within a dataset whose stated geographic scope is China; it does not give a specimen locality, season or a particular Chinese recipe. The IUCN caveat about taxonomy beyond Europe remains relevant when interpreting country lists, and the checklist entry should not be overstated as an independently checked population map.

Spain's 2009 marketing regulation offers a different kind of evidence: its preamble says C. cornucopioides was not among the species listed at that time and mentions it as a species research suggested could be included under safeguards. This is neither a harvest record nor a blanket legal permission. A species' appearance in an edible checklist, field guide or historic table does not override current local food law.

Safety and limits

Use this page as a researched account of a named ingredient, not as a guide to identifying wild mushrooms. Eat only mushrooms identified with confidence by a qualified local expert and prepared as a cooked food in line with local guidance. The dark colour and hollow funnel are not enough to distinguish all regional taxa, and a species-labelled photograph does not validate the name. In regions where “black trumpet” is used for more than one species, local taxonomy and public-health advice take priority.

IUCN assessed C. cornucopioides as Least Concern globally in 2024 but reports that the population trend is unknown and notes its dependence on forest habitat. That global category does not establish the condition of every local population or justify unrestricted collection. The sources reviewed provide no measured harvest threshold. Spanish rules also show why commercial acceptance and culinary tradition are distinct questions: the 2009 preamble treated the species as a possible future addition to the list, not as an already listed mushroom under that framework.