''Auricularia cornea'' (毛木耳, maomuer or cloud ear) is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

fungus A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds, as well as the more familiar mushrooms. These organisms are classified as a kingdom, separately from t ...

in the order

Auriculariales The Auriculariales are an order of fungi in the class Agaricomycetes. Species within the order were formerly referred to the " heterobasidiomycetes" or "jelly fungi", since many have gelatinous basidiocarps (fruit bodies) that produce spores on s ...

. It is commercially cultivated for food in China. The species was previously referred to ''Auricularia polytricha'', but the latter species is probably a later synonym. ''Auricularia cornea'' is a popular ingredient in many Chinese dishes and is also used in traditional Chinese medicine.

Taxonomy

''Auricularia cornea'' was originally described from Hawaii (

Oahu Oahu () ( Hawaiian: ''Oʻahu'' ()), also known as "The Gathering Place", is the third-largest of the Hawaiian Islands. It is home to roughly one million people—over two-thirds of the population of the U.S. state of Hawaii. The island of O� ...

) by German naturalist

Christian Gottfried Ehrenberg Christian Gottfried Ehrenberg (19 April 1795 – 27 June 1876) was a German Natural history, naturalist, zoologist, comparative anatomist, geologist, and microscopy, microscopist. Ehrenberg was an Evangelicalism, evangelist and was considered to ...

in 1820. It was accepted as a distinct species by Bernard Lowy in his 1952 world monograph of ''

Auricularia ''Auricularia'' is a genus of fungi in the family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maint ...

'' and subsequently confirmed as distinct by molecular research, based on

cladistic Cladistics (; ) is an approach to biological classification in which organisms are categorized in groups ("clades") based on hypotheses of most recent common ancestry. The evidence for hypothesized relationships is typically shared derived char ...

analysis of

DNA sequences A nucleic acid sequence is a succession of bases signified by a series of a set of five different letters that indicate the order of nucleotides forming alleles within a DNA (using GACT) or RNA (GACU) molecule. By convention, sequences are us ...

. ''Auricularia polytricha'', originally described from India (

Eastern Ghats The Eastern Ghats are a discontinuous range of mountains along India's eastern coast. The Eastern Ghats pass through Odisha, Andhra Pradesh to Tamil Nadu in the south passing some parts of Karnataka as well as Telangana. They are eroded and cut ...

) by French mycologist Camille Montagne in 1834, is a probable later synonym.

Vernacular names

The species is called in Mandarin , lit. "cloud ear", , lit. "hairy wood ear"), and in

Japanese Japanese may refer to: * Something from or related to Japan, an island country in East Asia * Japanese language, spoken mainly in Japan * Japanese people, the ethnic group that identifies with Japan through ancestry or culture ** Japanese diaspor ...

it is called ''ara-ge-ki-kurage'' ( アラゲキクラゲ, lit. "rough-hair-tree-jellyfish"). It is one of several gelatinous fungi known as

wood ear Wood-ear or tree ear (, Korean: 목이 버섯), also translated wood jellyfish or , can refer to a few similar-looking edible fungi used primarily in Chinese cuisine; these are commonly sold in Asian markets shredded and dried. * ''Auricularia he ...

, wood fungus, ear fungus, or tree ear fungus, an allusion to their rubbery, ear-shaped fruitbodies. In

Hawaii Hawaii ( ; haw, Hawaii or ) is a state in the Western United States, located in the Pacific Ocean about from the U.S. mainland. It is the only U.S. state outside North America, the only state that is an archipelago, and the only state ...

, it is known as ''pepeiao'' which means "ear" In Southeast Asia, it is known as bok née in local English (from the

Hokkien The Hokkien () variety of Chinese is a Southern Min language native to and originating from the Minnan region, where it is widely spoken in the south-eastern part of Fujian in southeastern mainland China. It is one of the national languages ...

木耳 ''bo̍k-ní'') and is used in the salad ''kerabu bok nee''. In

Indonesia Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...

and

Malaysia Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...

, it is called ''jamur kuping'', meaning "the ear mushroom", and in the

Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...

it is called ''tenga ng daga'', meaning "rat's ear", due to its appearance. In

Chinese cooking Chinese cuisine encompasses the numerous cuisines originating from China, as well as overseas cuisines created by the Chinese diaspora. Because of the Chinese diaspora and historical power of the country, Chinese cuisine has influenced many o ...

, it is often referred to as "Black Treasure". In New Zealand, it is known as ''hakeke'' by

Māori Māori or Maori can refer to: Relating to the Māori people * Māori people of New Zealand, or members of that group * Māori language, the language of the Māori people of New Zealand * Māori culture * Cook Islanders, the Māori people of the C ...

. The white, unpigmented form of ''A. cornea'' is called ''yumuer'' in China and is now cultivated.

Description

Fruit bodies solitary or clustered, ear-shaped, laterally attached to wood, sometimes by a very short stalk, elastic, gelatinous, pale brown to reddish brown, rarely white, up to 90 mm wide and 2 mm thick; upper surface densely hairy; under surface smooth. Under a microscope, the hairs on the upper surface are thick-walled, 180–425 × 6–9 μm. Basidia cylindrical, hyaline, three-septate, 60–75 × 4–6 μm. Spores hyaline, allantoid (sausage-shaped), 14–16.5 × 4.5–6 μm.

Habitat and distribution

''Auricularia cornea'' grows on dead fallen or standing wood of broadleaf trees. The species is widely distributed in southern Asia, Africa, Australasia and the Pacific, and South America.

Uses

''Auricularia cornea'' is usually sold in dried form, and needs to be soaked in water before use. While almost tasteless, it is prized for its slippery but slightly crunchy texture, and its potential nutritional benefits. The slight crunchiness persists despite most cooking processes. ''Auricularia cornea'' is coarser than ''

Auricularia heimuer ''Auricularia heimuer'', also known as heimuer () or black wood ear, is a species of fungus in the order Auriculariales. It is commercially cultivated for food in China at a value exceeding $4 billion (USD) per year. The species was previously r ...

'', and is more likely to be used in soups rather than stir-fries.

traditionally cooked wood ear fungus by steaming in an earth oven and eating with sow thistle and potatoes. From the 1870s to the 1950s, the fungus was collected and exported from New Zealand to China. According to Chinese medicine practitioners, eating dried and cooked wood ear can have health benefits for people with high blood pressure or cancer, and can prevent coronary heart disease and arteriosclerosis. This fungus is used in Cantonese desserts. A cup of dry cloud ear fungus contains 19.6 grams of dietary fibre.

References

External links

Black Fungus

{{Taxonbar, from=Q10422716 Auriculariales Chinese edible mushrooms Edible fungi Fungi in cultivation Buddhist cuisine Fungi of Asia Fungi of Australia Fungi of New Zealand Fungi described in 1820 Fungi of Africa Fungi of South America Taxa named by Christian Gottfried Ehrenberg