Hydnaceae | |
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Hydnum repandum | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Fungi |
Division: | Basidiomycota |
Class: | Agaricomycetes |
Order: | Cantharellales |
Family: | Hydnaceae Chevall., 1826 |
Type genus | |
Hydnum | |
Genera | |
Burgoa(anamorph) Contents | |
Synonyms [1] | |
Repetobasidiaceae Jülich |
The Hydnaceae are a family of fungi in the order Cantharellales. Originally the family encompassed all species of fungi that produced basidiocarps (fruit bodies) having a hymenium (spore-bearing surface) consisting of slender, downward-hanging tapering extensions referred to as "spines" or "teeth", [2] whether they were related or not. This artificial but often useful grouping is now more generally called the hydnoid or tooth fungi. In the strict, modern sense, the Hydnaceae are limited to the genus Hydnum and related genera, with basidiocarps having a toothed or poroid hymenium. Species in the family are ectomycorrhizal, forming a mutually beneficial relationship with the roots of trees and other plants. Hydnum repandum (the hedgehog fungus) is an edible species, commercially collected in some countries and often marketed under the French name pied de mouton.
The family was originally described in 1826 by French botanist François Fulgis Chevallier to accommodate all the larger fungi with a toothed or spiny hymenium. As such, the family was entirely artificial, bringing together a diverse assemblage of species that have subsequently been reassigned to various families. [3] In 1933, Dutch mycologist Marinus Anton Donk radically limited the Hydnaceae (which he referred to the tribe Hydneae) to Hydnum repandum and related species that produced "stichic" basidia (basidia with nuclear spindles arranged longitudinally). He considered this feature placed these species closer to the chanterelles (Cantharellaceae) than to other hydnoid fungi. [3] [4] Donk's disposition of the family was widely accepted and a standard 1995 text placed Hydnum and the Hydnaceae within the Cantharellales, though still retaining some additional genera ( Amylodontia , Climacodon , Corallofungus , Dentinum , Gloeomucro , Nigrohydnum , Phaeoradulum , and Stegiacantha ) within the family. [5] Most of these have now been placed elsewhere.
Molecular research, based on cladistic analysis of DNA sequences, has confirmed Donk's placement of the Hydnaceae as a family within the Cantharellales. [6] [7] The precise boundaries of the family have not been investigated, but it appears that the type and related species of the genus Sistotrema belong within the Hydnaceae, as well as most species of Hydnum itself. [8] These Sistotrema species have poroid basidiocarps and are not closely related to the majority of "Sistotrema" species which may belong within the Clavulinaceae. [9] The status of Corallofungus has not been investigated. According to the Dictionary of the Fungi (10th edition, 2008), the family contains 9 genera and 190 species. [1]
The placement of the Hydnaceae as a family within the Cantharellales: [10]
Cantharellales |
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Phylogenetic tree presenting the current opinion on relationships among genera: [10]
Hydnaceae |
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The fruit bodies of species in the family have caps and stems that are usually centrally attached. Colors typically range from white to yellow to orange, and the teeth are typically lighter than the cap surface. The flesh is fleshy and brittle, and monomitic (consisting of generative hyphae only). The generative hyphae are thin-walled, branched, contain septa, and have clamp connections. Spores range in shape from roughly spherical to egg-shaped, have a smooth surface, and are colorless. [13] A distinctive characteristic of many species in the family is the structure of the hymenium (spore-bearing surface), which consists of pendant, toothlike spines. [14]
All species within the Hydnaceae are believed to be ectomycorrhizal, forming a mutually beneficial relationships with the roots of living trees and other plants. Basidiocarps typically occur on the ground or in leaf litter in woodland. [15] [16] The family has a cosmopolitan distribution.
Several species of Hydnum are edible and Hydnum repandum is commercially collected and marketed in Europe, [17] often under the French name pied de mouton. [18] In North America, the related Hydnum umbilicatum is also commercially collected, sometimes under the name "sweet tooth". [19]
The Cantharellaceae are a family of fungi in the order Cantharellales. The family contains the chanterelles and related species, a group of fungi that superficially resemble agarics but have smooth, wrinkled, or gill-like hymenophores. Species in the family are ectomycorrhizal, forming a mutually beneficial relationship with the roots of trees and other plants. Many of the Cantharellaceae, including the chanterelle, the Pacific golden chanterelle, the horn of plenty, and the trumpet chanterelle, are not only edible, but are collected and marketed internationally on a commercial scale.
The Cantharellales are an order of fungi in the class Agaricomycetes. The order includes not only the chanterelles (Cantharellaceae), but also some of the tooth fungi (Hydnaceae), clavarioid fungi, and corticioid fungi (Botryobasidiaceae). Species within the order are variously ectomycorrhizal, saprotrophic, associated with orchids, or facultative plant pathogens. Those of economic importance include edible and commercially collected Cantharellus, Craterellus, and Hydnum species as well as crop pathogens in the genera Ceratobasidium and Thanatephorus/Rhizoctonia.
In fungi, a basidiocarp, basidiome, or basidioma is the sporocarp of a basidiomycete, the multicellular structure on which the spore-producing hymenium is borne. Basidiocarps are characteristic of the hymenomycetes; rusts and smuts do not produce such structures. As with other sporocarps, epigeous (above-ground) basidiocarps that are visible to the naked eye are commonly referred to as mushrooms, while hypogeous (underground) basidiocarps are usually called false truffles.
Hydnum repandum, commonly known as the sweet tooth, wood hedgehog or hedgehog mushroom, is a basidiomycete fungus of the family Hydnaceae. First described by Carl Linnaeus in 1753, it is the type species of the genus Hydnum. The fungus produces fruit bodies (mushrooms) that are characterized by their spore-bearing structures—in the form of spines rather than gills—which hang down from the underside of the cap. The cap is dry, colored yellow to light orange to brown, and often develops an irregular shape, especially when it has grown closely crowded with adjacent fruit bodies. The mushroom tissue is white with a pleasant odor and a spicy or bitter taste. All parts of the mushroom stain orange with age or when bruised.
The Clavariaceae are a family of fungi in the order Agaricales. Originally the family contained most of the clavarioid fungi, but in its current sense is more restricted, albeit with a greater diversity of basidiocarp forms. Basidiocarps are variously clavarioid or agaricoid (mushroom-shaped), less commonly corticioid or hydnoid.
The Clavulinaceae are a family of fungi in the order Cantharellales. The family is not well defined, but currently comprises species of clavarioid fungi as well as some corticioid fungi. These species are nutritionally diverse, some being ectomycorrhizal, others wood-rotting saprotrophs, others lichenized, and yet others lichenicolous.
The Thelephorales are an order of fungi in the class Agaricomycetes. The order includes corticioid and hydnoid fungi, together with a few polypores and clavarioid species. Most fungi within the Thelephorales are ectomycorrhizal. None is of any great economic importance, though Sarcodon imbricatus is edible and commercially marketed, whilst several species have been used for craft dyeing.
Hydnum is a genus of fungi in the family Hydnaceae. They are notable for their unusual spore-bearing structures of teeth rather than gills. The best known are the edible species Hydnum repandum and H. rufescens. There are no known toxic varieties of Hydnum. Widely regarded as important maintainers of forest ecosystems, the Hydnum genus is known to have ectomycorrhizal relationships with multiple plant families. Hydnum has many brittle, white teeth from which the spores drop. Some species have teeth which hang from ascending branches, while other species have teeth which project downwards from the undersurfaces of dead wood. Most Hydnum species are safe to eat, and contain many fatty acids and antioxidants.
Hydnellum is a genus of tooth fungi in the family Bankeraceae. Widely distributed in the Northern Hemisphere, the genus contains around 40 species. The fruitbodies of its members grow by slowly enveloping nearby bits of grass and vegetation. There is great variability in the form of Hydnellum fruitbodies, which are greatly influenced by environmental conditions such as rainfall and humidity, drying winds, and temperature. They are too tough and woody to eat comfortably. Several species have become the focus of increasing conservation concern following widespread declines in abundance.
The Botryobasidiaceae are a family of fungi in the order Cantharellales. The family contains a group of corticioid fungi that form thin, web-like basidiocarps. Some species form asexual anamorphs producing chlamydospores. All are believed to be wood-rotting or litter-rotting saprotrophs. None is known to be of any economic importance.
Phellodon is a genus of tooth fungi in the family Bankeraceae. Species have small- to medium-sized fruitbodies with white spines on the underside from which spores are released. All Phellodon have a short stalk or stipe, and so the genus falls into the group known as stipitate hydnoid fungi. The tough and leathery flesh usually has a pleasant, fragrant odor, and develops a cork-like texture when dry. Neighboring fruitbodies can fuse, sometimes producing large mats of joined caps. Phellodon species produce a white spore print, while the individual spores are roughly spherical to ellipsoid in shape, with spiny surfaces.
Hydnellum aurantiacum is an inedible fungus, commonly known as the orange spine or orange Hydnellum for its reddish orange or rusty red colored fruit bodies. Like other tooth fungi, it bears a layer of spines rather than gills on the underside of the cap. Due to substantial declines in sightings, this species is listed as critically endangered in the United Kingdom.
Hericium is a genus of edible mushrooms in the family Hericiaceae. Species in this genus are white and fleshy and grow on dead or dying wood; fruiting bodies resemble a mass of fragile icicle-like spines that are suspended from either a branched supporting framework or from a tough, unbranched cushion of tissue. This distinctive structure has earned Hericium species a variety of common names—monkey's head, lion's mane, and bear's head are examples. Taxonomically, this genus was previously placed within the order Aphyllophorales, but recent molecular studies now place it in the Russulales.
The corticioid fungi are a group of fungi in the Basidiomycota typically having effused, smooth basidiocarps that are formed on the undersides of dead tree trunks or branches. They are sometimes colloquially called crust fungi or patch fungi. Originally such fungi were referred to the genus Corticium and subsequently to the family Corticiaceae, but it is now known that all corticioid species are not necessarily closely related. The fact that they look similar is an example of convergent evolution. Since they are often studied as a group, it is convenient to retain the informal (non-taxonomic) name of "corticioid fungi" and this term is frequently used in research papers and other texts.
The clavarioid fungi are a group of fungi in the Basidiomycota typically having erect, simple or branched basidiocarps that are formed on the ground, on decaying vegetation, or on dead wood. They are colloquially called club fungi and coral fungi.
The hydnoid fungi are a group of fungi in the Basidiomycota with basidiocarps producing spores on pendant, tooth-like or spine-like projections. They are colloquially called tooth fungi. Originally such fungi were referred to the genus Hydnum, but it is now known that not all hydnoid species are closely related.
The Ceratobasidiaceae are a family of fungi in the order Cantharellales. All species within the family have basidiocarps that are thin and effused. They have sometimes been included within the corticioid fungi or alternatively within the "heterobasidiomycetes". Species are saprotrophic, but some are also facultative plant pathogens or are associated with orchid mycorrhiza. Genera of economic importance include Ceratobasidium and Rhizoctonia, both of which contain plant pathogenic species causing diseases of commercial crops and turf grass.
The Tulasnellaceae are a family of fungi in the order Cantharellales. The family comprises mainly effused (patch-forming) fungi formerly referred to the "jelly fungi" or heterobasidiomycetes. Species are wood- or litter-rotting saprotrophs, but many are also endomycorrhizal associates of orchids and some have also been thought to form ectomycorrhizal associations with trees and other plants.
Sistotrema is a genus of fungi in the family Hydnaceae. The genus contains at least 55 species and has a worldwide distribution. The type species is Sistotrema confluens Pers. (1794).
Botryobasidium is a genus of corticioid fungi belonging to the order Cantharellales. Basidiocarps are ephemeral and typically form thin, web-like, white to cream, effused patches on the underside of fallen branches, logs, and leaf litter. Several species form anamorphs producing chlamydospores. All species are wood- or litter-rotting saprotrophs and the genus has a worldwide distribution.