Summer truffle
Encyclopedia
The summer truffle or burgundy truffle (Tuber uncinatum) is a species of truffle, found in almost all Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

an countries.

Taxonomy

In cuisine and commerce, particularly in France and Italy, the summer truffle (T. aestivum) is distinguished from the burgundy truffle (T. uncinatum). However, molecular analysis showed in 2004 that these two varieties of truffle are one species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

. The differences between them are therefore likely due to environmental factors.

This article uses the older of the two binomial names, T. aestivum, to designate the species, while discussing the characteristics of the two varieties separately.

Burgundy truffles

Burgundy truffles , have an intense, hazelnut
Hazelnut
A hazelnut is the nut of the hazel and is also known as a cob nut or filbert nut according to species. A cob is roughly spherical to oval, about 15–25 mm long and 10–15 mm in diameter, with an outer fibrous husk surrounding a smooth shell. A filbert is more elongated, being about twice...

-like aroma and are highly prized for their gastronomic qualities. They are used in the haute cuisine
Haute cuisine
Haute cuisine or grande cuisine was characterised by French cuisine in elaborate preparations and presentations served in small and numerous courses that were produced by large and hierarchical staffs at the grand restaurants and hotels of Europe.The 17th century chef and writer La Varenne...

of France and Italy, as well as a substitute for the Périgord black truffle (T. melanosporum). Like other truffles, they are also canned and bottled for export.

With bodies (ascocarp
Ascocarp
An ascocarp, or ascoma , is the fruiting body of an ascomycete fungus. It consists of very tightly interwoven hyphae and may contain millions of asci, each of which typically contains eight ascospores...

s) from 2 centimetre (0.78740157480315 in) to 10 centimetres (4 in) in diameter, burgundy truffles are relatively large. Their brown or black outer skin (peridium
Peridium
The peridium is the protective layer that encloses a mass of spores in fungi. This outer covering is a distinctive feature of the Gasteromycetes.-Description:...

) forms pyramidal warts about 3 to 9 mm wide, resembling rough bark
Bark
Bark is the outermost layers of stems and roots of woody plants. Plants with bark include trees, woody vines and shrubs. Bark refers to all the tissues outside of the vascular cambium and is a nontechnical term. It overlays the wood and consists of the inner bark and the outer bark. The inner...

.

Burgundy truffles are harvested from September to late December, sometimes also until late January. They have a wider distribution than any other truffle species. Burgundy truffles are found across Europe, from Spain to eastern Europe and from Sweden to North Africa. In France they are found mainly in the north-east and in Italy, in the north. In the United Kingdom they were plentiful prior to the 20th century, but are now rare. Their distribution may not yet be definitively established: there are as of 2007 unconfirmed reports of findings in China.

Summer truffles

The flavor, size and color of summer truffles is similar to that of burgundy truffles, but their aroma is less intense and the flesh (gleba
Gleba
Gleba is the fleshy spore-bearing inner mass of fungi such as the puffball or stinkhorn.The gleba is a solid mass of spores, generated within an enclosed area within the sporocarp. The continuous maturity of the sporogenous cells leave the spores behind as a powdery mass that can be easily blown away...

) is a paler hazel color.

As their name suggests, summer truffles are harvested earlier than burgundy truffles, from May to August. They are most often found in the southern part of the distribution area of the species, notably in the Mediterranean climate
Mediterranean climate
A Mediterranean climate is the climate typical of most of the lands in the Mediterranean Basin, and is a particular variety of subtropical climate...

areas of France, Italy and Spain.
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