Boletus reticulatus
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''Boletus reticulatus'' (alternately known as ''Boletus aestivalis'' (Paulet) Fr.), and commonly referred to as the summer cep is a basidiomycete fungus of the
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
''
Boletus ''Boletus'' is a genus of mushroom-producing fungi, comprising over 100 species. The genus ''Boletus'' was originally broadly defined and described by Carl Linnaeus in 1753, essentially containing all fungi with hymenial pores instead of gil ...
''. It occurs in deciduous forests of Europe where it forms a symbiotic
mycorrhiza   A mycorrhiza (from Greek μύκης ', "fungus", and ῥίζα ', "root"; pl. mycorrhizae, mycorrhiza or mycorrhizas) is a symbiotic association between a fungus and a plant. The term mycorrhiza refers to the role of the fungus in the plant ...
l relationship with species of oak (''
Quercus An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably '' ...
''). The fungus produces fruiting bodies in the summer months which are edible and popularly collected. The summer cep was formally described by
Jacob Christian Schäffer Jacob Christian Schäffer, alternatively Jakob, (31 May 1718 – 5 January 1790) was a German dean, professor, botanist, mycologist, entomologist, ornithologist and inventor. Biography From 1736 to 1738 he studied Theology at the University of ...
as ''Boletus reticulatus'' in 1774, which took precedence over ''B. aestivalis'' as described by
Jean-Jacques Paulet Jean-Jacques Paulet (26 April 1740 – 4 August 1826) was a French mycologist. Paulet was born in Anduze, France and studied medicine in Montpellier, where he received his PhD in March 1764. He published in Paris in 1765 a book titled ''d’Histo ...
in 1793.


Taxonomy

German naturalist
Jacob Christian Schäffer Jacob Christian Schäffer, alternatively Jakob, (31 May 1718 – 5 January 1790) was a German dean, professor, botanist, mycologist, entomologist, ornithologist and inventor. Biography From 1736 to 1738 he studied Theology at the University of ...
described the summer cep as ''Boletus reticulatus'' in 1774, in his series on fungi of
Bavaria Bavaria ( ; ), officially the Free State of Bavaria (german: Freistaat Bayern, link=no ), is a state in the south-east of Germany. With an area of , Bavaria is the largest German state by land area, comprising roughly a fifth of the total lan ...
and the Palatinate, ''Fungorum qui in Bavaria et Palatinatu circa Ratisbonam nascuntur icones.'' French mycologist
Jean-Jacques Paulet Jean-Jacques Paulet (26 April 1740 – 4 August 1826) was a French mycologist. Paulet was born in Anduze, France and studied medicine in Montpellier, where he received his PhD in March 1764. He published in Paris in 1765 a book titled ''d’Histo ...
described it as Le grand Mousseux (''Tubiporus aestivalis'') in 1793, adding that it was delicious with chicken fricassee and could be found in the
Bois de Boulogne The Bois de Boulogne (, "Boulogne woodland") is a large public park located along the western edge of the 16th arrondissement of Paris, near the suburb of Boulogne-Billancourt and Neuilly-sur-Seine. The land was ceded to the city of Paris by t ...
in summer. the species name the species name is derived from the
Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
''aestas'' "summer". Swedish mycologist
Elias Magnus Fries Elias Magnus Fries (15 August 1794 – 8 February 1878) was a Swedish mycologist and botanist. Career Fries was born at Femsjö (Hylte Municipality), Småland, the son of the pastor there. He attended school in Växjö. He acquired ...
followed Paulet, using ''Boletus aestivalis'' in 1838. The two names have been used in literature for many years. ''Boletus reticulatus'' is classified in ''Boletus''
section Section, Sectioning or Sectioned may refer to: Arts, entertainment and media * Section (music), a complete, but not independent, musical idea * Section (typography), a subdivision, especially of a chapter, in books and documents ** Section sign ...
''Boletus'', alongside close relatives such as '' B. aereus'', '' B. edulis'', and '' B. pinophilus''. A genetic study of the four European species found that ''B. reticulatus'' was
sister A sister is a woman or a girl who shares one or more parents with another individual; a female sibling. The male counterpart is a brother. Although the term typically refers to a familial relationship, it is sometimes used endearingly to refer to ...
to ''B. aereus''. More extensive testing of worldwide taxa revealed that ''B. reticulatus'' was most closely related to two lineages that had been classified as ''B. edulis'' from southern China and Korea/northern China respectively. The common ancestor of these three species was related to a lineage consisting of ''B. aereus'' and the genetically close '' B. mamorensis''. Molecular analysis suggests that the ''B. aereus/mamorensis'' and ''B. reticulatus''/Chinese ''B.'' "edulis" lineages diverged around 6 to 7 million years ago. The
British Mycological Society The British Mycological Society is a learned society established in 1896 to promote the study of fungi. Formation The British Mycological Society (BMS) was formed by the combined efforts of two local societies: the Woolhope Naturalists' Field ...
approved the name "summer bolete" for ''Boletus reticulatus''.


Description

The summer cep's fruiting body is a mushroom with a swollen bulbous stem, and large convex cap. The cap is more or less round and usually up to 20(40) centimetres in diameter. It bears a velvety brown, rust to chocolate cuticle which when dry often cracks to reveal the white flesh underneath, giving the appearance of a net. The darker, more uniform shade and the velvety feel of the cap are a key feature distinguishing this species as is the vagueness or total absence of a white edge to the cap margin as seen in ''
Boletus edulis ''Boletus edulis'' (English: cep, penny bun, porcino or porcini) is a basidiomycete fungus, and the type species of the genus ''Boletus''. Widely distributed in the Northern Hemisphere across Europe, Asia, and North America, it does not occu ...
''. The tubes and pores of the
hymenium The hymenium is the tissue layer on the hymenophore of a fungal fruiting body where the cells develop into basidia or asci, which produce spores. In some species all of the cells of the hymenium develop into basidia or asci, while in others some ...
are initially white, darkening with age to pale yellow and finally brown. The stipe is central (up to 16(30) cm in height) and has a strongly marked reticulated pattern with a variable white to brown colour. The flesh is white and thick and remains firm if yellowish as the mushroom ages, and is often attacked by insect larvae. Its odour is pleasant.


Distribution and habitat

The summer cep is found in woods throughout Europe, after hot and humid weather, from the start of summer until the end of autumn. It is particularly common in the south and west of France, as well as in Tosco-Emiliano Apennine in
Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...
. It is less host-specific than other porcini mushrooms. It occurs in Ukraine and Crimea, and
Republic of Karelia The Republic of Karelia (russian: Респу́блика Каре́лия, Respublika Kareliya; ; krl, Karjalan tašavalta; ; fi, Karjalan tasavalta; vep, Karjalan Tazovaldkund, Ludic: ''Kard’alan tazavald''), also known as just Karelia (rus ...
,
Karachay-Cherkessia The Karachay-Cherkess Republic (russian: Карача́ево-Черке́сская Респу́блика, ''Karachayevo-Cherkesskaya Respublika''; krc, Къарачай-Черкес Республика, ''Qaraçay-Çerkes Respublika''; Cir ...
,
Krasnodar Krai Krasnodar Krai (russian: Краснода́рский край, r=Krasnodarsky kray, p=krəsnɐˈdarskʲɪj kraj) is a federal subject of Russia (a krai), located in the North Caucasus region in Southern Russia and administratively a part of t ...
,
Tula Oblast Tula Oblast (russian: Ту́льская о́бласть, ''Tulskaya oblast'') is a federal subjects of Russia, federal subject (an Oblasts of Russia, oblast) of Russia. It is geographically in the European Russia region of the country and is p ...
,
Moscow Oblast Moscow Oblast ( rus, Моско́вская о́бласть, r=Moskovskaya oblast', p=mɐˈskofskəjə ˈobləsʲtʲ), or Podmoskovye ( rus, Подмоско́вье, p=pədmɐˈskovʲjə, literally "under Moscow"), is a federal subject of Rus ...
, and as far east as
Primorsky Krai Primorsky Krai (russian: Приморский край, r=Primorsky kray, p=prʲɪˈmorskʲɪj kraj), informally known as Primorye (, ), is a federal subject (a krai) of Russia, located in the Far East region of the country and is a part of the ...
in Russia. ''Boletus reticulatus'' has been recovered from southern Africa, where it was likely introduced, growing under the Mexican species ''
Pinus patula ''Pinus patula'', commonly known as patula pine, spreading-leaved pine, or Mexican weeping pine, and in Spanish as ''pino patula'' or ''pino llorón'', (''patula'' Latin = “spreading”) is a tree native to the highlands of Mexico. It grows f ...
''.


Edibility

The summer cep, like most ceps, is edible and useful in cooking. However, its flesh is somewhat less firm than other ceps. Based on analysis of fruit bodies collected in Portugal, there are 334
kilocalorie The calorie is a unit of energy. For historical reasons, two main definitions of "calorie" are in wide use. The large calorie, food calorie, or kilogram calorie was originally defined as the amount of heat needed to raise the temperature of on ...
s per 100 gram of bolete (as
dry weight Vehicle weight is a measurement of wheeled motor vehicles; either an actual measured weight of the vehicle under defined conditions or a gross weight rating for its weight carrying capacity. Curb or kerb weight Curb weight (U.S. English) or kerb ...
). The
macronutrient A nutrient is a substance used by an organism to survive, grow, and reproduce. The requirement for dietary nutrient intake applies to animals, plants, fungi, and protists. Nutrients can be incorporated into cells for metabolic purposes or excret ...
composition of 100 grams of dried bolete includes 22.6 grams of
protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, respo ...
, 55.1 grams of
carbohydrate In organic chemistry, a carbohydrate () is a biomolecule consisting of carbon (C), hydrogen (H) and oxygen (O) atoms, usually with a hydrogen–oxygen atom ratio of 2:1 (as in water) and thus with the empirical formula (where ''m'' may or ma ...
s, and 2.6 grams of
fat In nutrition science, nutrition, biology, and chemistry, fat usually means any ester of fatty acids, or a mixture of such chemical compound, compounds, most commonly those that occur in living beings or in food. The term often refers spec ...
. By weight, fresh fruit bodies are about 91% water. ''B. reticulatus'' contains predominantly unsaturated fatty acids; mainly cis-linoleic acid, followed by cis-oleic, palmitic, and stearic acids. The carbohydrate component contains the
monosaccharide Monosaccharides (from Greek ''monos'': single, '' sacchar'': sugar), also called simple sugars, are the simplest forms of sugar and the most basic units (monomers) from which all carbohydrates are built. They are usually colorless, water-solub ...
s
glucose Glucose is a simple sugar with the molecular formula . Glucose is overall the most abundant monosaccharide, a subcategory of carbohydrates. Glucose is mainly made by plants and most algae during photosynthesis from water and carbon dioxide, using ...
,
mannitol Mannitol is a type of sugar alcohol used as a sweetener and medication. It is used as a low calorie sweetener as it is poorly absorbed by the intestines. As a medication, it is used to decrease pressure in the eyes, as in glaucoma, and to lower ...
and α,α-
trehalose Trehalose (from Turkish '' tıgala'' – a sugar derived from insect cocoons + -ose) is a sugar consisting of two molecules of glucose. It is also known as mycose or tremalose. Some bacteria, fungi, plants and invertebrate animals synthesize it ...
, the
polysaccharide Polysaccharides (), or polycarbohydrates, are the most abundant carbohydrates found in food. They are long chain polymeric carbohydrates composed of monosaccharide units bound together by glycosidic linkages. This carbohydrate can react with wa ...
glycogen Glycogen is a multibranched polysaccharide of glucose that serves as a form of energy storage in animals, fungi, and bacteria. The polysaccharide structure represents the main storage form of glucose in the body. Glycogen functions as one o ...
, and the water-insoluble structural polysaccharide
chitin Chitin ( C8 H13 O5 N)n ( ) is a long-chain polymer of ''N''-acetylglucosamine, an amide derivative of glucose. Chitin is probably the second most abundant polysaccharide in nature (behind only cellulose); an estimated 1 billion tons of chit ...
, which accounts for up to 80–90% of dry matter in mushroom
cell wall A cell wall is a structural layer surrounding some types of cells, just outside the cell membrane. It can be tough, flexible, and sometimes rigid. It provides the cell with both structural support and protection, and also acts as a filtering mech ...
s. Chitin,
hemicellulose A hemicellulose (also known as polyose) is one of a number of heteropolymer, heteropolymers (matrix polysaccharides), such as arabinoxylans, present along with cellulose in almost all embryophyte, terrestrial plant cell walls.Scheller HV, Ulvskov H ...
, and
pectin Pectin ( grc, πηκτικός ': "congealed" and "curdled") is a heteropolysaccharide, a structural acid contained in the primary lamella, in the middle lamella, and in the cell walls of terrestrial plants. The principal, chemical component of ...
-like carbohydrates—all indigestible by humans—contribute to high proportion of insoluble fibre in ''B. reticulatus''. It also contains more
tocopherol Tocopherols (; TCP) are a class of organic chemical compounds (more precisely, various methylated phenols), many of which have vitamin E activity. Because the vitamin activity was first identified in 1936 from a dietary fertility factor in rats, i ...
than other species of mushroom.


See also

* List of ''Boletus'' species *
List of North American boletes __NOTOC__ This is a list of bolete species found in North America. Bolding of the species name, and an asterisk (*) following indicate the species is the type species of that genus. ''Aureoboletus'' *'' Aureoboletus auriporus'' *'' Aureoboletus ...


References


Notes

* *This article contains translations from the French Wikipedia article. {{Taxonbar, from=Q26203726 Edible fungi reticulatus Fungi of Europe Fungi described in 1763