Collybia cirrhata

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Collybia cirrhata
Collybia cirrhata 109110.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Tricholomataceae
Genus: Collybia
Species:
C. cirrhata
Binomial name
Collybia cirrhata
(Schumach.) Quél. (1879)
Synonyms [1] [2]

Agaricus amanitae Batsch (1786)
Agaricus amanitae subsp. cirrhata Pers. (1800)
Agaricus cirrhatusSchumach. (1803)
Sclerotium truncorum(Tode) Fr. (1822)
Microcollybia cirrhata(Schumach.) Georges Métrod (1952)
Microcollybia cirrhata(Schumach.) Lennox (1979)
Collybia amanitae(Batsch) Kreisel (1987)

Collybia cirrhata
Information icon.svg
Gills icon.png Gills on hymenium
Convex cap icon.svgFlat cap icon.svg Cap is convex or flat
Adnate gills icon2.svg Hymenium is adnate
Bare stipe icon.svg Stipe is bare
Transparent spore print icon.svg
Spore print is white
Saprotrophic fungus.svgEcology is saprotrophic
Mycomorphbox Question.pngEdibility is unknown

Collybia cirrhata is a species of fungus in the family Tricholomataceae of the order Agaricales (gilled mushrooms). The species was first described in the scientific literature in 1786, but was not validly named until 1803. Found in Europe, Northern Eurasia, and North America, it is known from temperate, boreal, and alpine or arctic habitats. It is a saprobic species that grows in clusters on the decaying or blackened remains of other mushrooms. The fruit bodies are small, with whitish convex to flattened caps up to 11 mm (38 in) in diameter, narrow white gills, and slender whitish stems 8–25 mm (38–1 in) long and up to 2 mm (0.08 in) thick. C. cirrhata can be distinguished from the other two members of Collybia by the absence of a sclerotium at the base of the stem. The mushroom is of unknown edibility.

Taxonomy and phylogeny

Phylogeny and relationships of C. cirrhata and closely related fungi based on ribosomal DNA sequences. [3]

The species first appeared in the scientific literature in 1786 as Agaricus amanitae by August Johann Georg Karl Batsch; [4] Agaricus amanitae subsp. cirrhatus, proposed by Christian Hendrik Persoon in 1800, [5] is considered synonymous. [2] A later combination based on this name, Collybia amanitae, was published by Hanns Kreisel in 1987. [6] However, Kreisel noted the combination to be "ined.", [7] indicating that he did not believe the name to be validly published, according to article 34.1 of the rules for botanical nomenclature, which states: "A name is not validly published ... when it is not accepted by the author in the original publication." [8]

The first valid name was published in 1803 by Heinrich Christian Friedrich Schumacher, who called the species Agaricus cirrhatus. [9] French mycologist Lucien Quélet transferred it to Collybia in 1879, [10] resulting in the binomial by which it is currently known. The species had also been transferred to Microcollybia by Georges Métrod in 1952 [11] and again by Lennox in 1979 (because Métrod's transfer was considered a nomen nudum , and thus invalid according to nomenclatural rules); [12] the genus Microcollybia has since been wrapped into Collybia. [13]

Molecular phylogenetics have shown that C. cirrhata forms a monophyletic clade with the remaining two species of Collybia. Because C. cirrhata is the only one of the three Collybia species lacking sclerotia, it has been suggested that this character trait is an anapomorphy—that is, unique to a single, terminal species within a clade. [3]

The specific epithet is derived from the Latin cirrata, meaning "curled". [14] Charles Horton Peck called it the "fringed-rooted Collybia". [15] In the United Kingdom, it is commonly known as the "piggyback shanklet". [16]

Description

The small fruit bodies typically grow in dense clusters. Collybia cirrhata 16757.jpg
The small fruit bodies typically grow in dense clusters.

The cap is initially convex when young, later becoming convex to flattened or slightly depressed in the center, reaching a diameter of 3–11 mm (1838 in). The cap margin starts out rolled or curved inward, but straightens out as it matures. The cap surface ranges from dry to moist, smooth to covered with fine whitish hairs, and is mostly even with translucent radial grooves at the margin. It is subhygrophanous (changing color somewhat depending on hydration), becoming a grayish-orange when watery or old, and usually is white with a very faint pinkish flush when fresh. The flesh is whitish, quite thin, and has no distinctive taste or odor. The gills are adnate to slightly arcuate (curved into the shape of a bow) with a tooth (meaning that the gills curve up to join the stem but then, very close to the stem, the gill edge curves down again). [17] There are between 12 and 20 gills that extend completely from the cap edge to the stem, and three to five tiers of lamellulae (shorter gills that do not extend completely from the cap edge to the stem). [7] The gills are thin, narrow to moderately broad, and white to pinkish-buff. The gill edges are even, and the same color as the gill faces. [18]

The stem is 8–25 mm (38–1 in) long and up to 2 mm (116 in) thick, equal in width throughout to slightly enlarged downward, flexible and filamentous but not fragile. The stem surface is dry, whitish to grayish-orange, sometimes with tiny hairs on the upper portion that become coarser near the base. The stem base often has rhizomorph-like strands or copious whitish mycelia. The stem, unlike the other two species of Collybia, do not originate from a sclerotium. The stem becomes hollow as it matures. [18] C. cirrhata is too small and insubstantial to be considered edible. [17]

Microscopic characteristics

In deposit, the spores appear white. [7] Individual spores are ellipsoid to tear-shaped in profile, obovoid to ellipsoid or roughly cylindric in face or back view, with dimensions of 4.8–6.4 by 2–2.8 (sometimes up to 3.5) μm. They are smooth, inamyloid, and acyanophilous (unreactive to staining with Melzer's reagent and methyl blue, respectively). The basidia (spore-bearing cells of the hymenium) are roughly club-shaped, four-spored, and measure 17.5–21 by 4.8–5.6 μm. The gills do not have cystidia. The gill tissue is made of hyphae that are interwoven to roughly parallel, and inamyloid. The hyphae are 2.8–8.4 μm in diameter and smooth. The cap tissue is made of interwoven hyphae beneath the center of the cap, but radially oriented over the gills; it too is inamyloid. These hyphae are 3.5–8.4 μm in diameter, smooth, but have irregularly thickened walls. The cap cuticle is an ixocutis—a gelatinized layer of hyphae lying parallel to the cap surface. The hyphae comprising this layer are 2.8–6.4 μm in diameter, smooth, and thin-walled. They are covered with scattered, short pouch-like outgrowths. The cuticle of the stem is a layer of parallel, vertically oriented hyphae; the hyphae measure 3.5–4.2 μm, and are smooth, slightly thick-walled, and pale yellowish-brown in alkaline solution. They give rise to a covering of tangled and branched caulocystidia (cystidia on the stem) that have multiple septa. The caulocystidia are 2.8–4.8 μm in diameter, smooth, thin walled, and shaped like contorted cylinders. Clamp connections are present in the hyphae of all tissues. [18]

Similar species

Collybia cirrhata is most likely to be confused with the remaining members of Collybia , which have a similar external appearance. C. tuberosa is distinguished by its dark reddish-brown sclerotia that resemble apple seeds, while C. cookei has wrinkled, often irregularly shaped sclerotia that are pale yellow to orange. [19] Other similar mushrooms include Baeospora myosura and species of Strobilurus , [20] but these species only grow on pine cones.

Habitat and distribution

Bovista dermoxantha 12285.jpg
Meripilus gigannteus prg 1.jpg
Collybia cirrhata grows on the old fruit bodies of fungi such as Bovista dermoxantha (left) and Meripilus giganteus (right).

Like all species remaining in the genus Collybia, C. cirrhata is saprobic, and is typically found growing on the decaying or blackened remains of other mushrooms; [19] occasionally the fruit bodies may be found growing on moss or soil without any apparent connection to decaying mushrooms, [21] although these observations may represent instances where the remnant host tissue—possibly from a previous season—has decayed to such an extent that it remains as buried fragments in the substrate. [3] Known hosts include Lactarius , Russula , Meripilus giganteus , and Bovista dermoxantha . [7] [22]

Collybia cirrhata is known from temperate, boreal, and alpine or arctic habitats. The fungus is widespread in Europe, [23] including Bulgaria, [24] Denmark, [25] Germany, [26] Greece, [21] Latvia, [27] Scandinavia, [28] Slovakia, [29] Switzerland, [22] Turkey, [30] and the United Kingdom. [31] The mushroom is also common in northern montane regions of North America. [19] In Asia, the fungus has been reported in Korea, [32] and in Hokkaido, northern Japan. It is also known from Greenland. [22] A 2009 publication suggested that based on the known evidence, the species' distribution may be circumboreal. [7]

Related Research Articles

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<i>Gymnopus dryophilus</i> Species of fungus

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<i>Mythicomyces</i> Genus of fungi

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<i>Hygrocybe virescens</i> Species of fungus

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<i>Cyptotrama asprata</i> Species of fungus

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<i>Mycena acicula</i> Species of fungus in the family Mycenaceae

Mycena acicula, commonly known as the orange bonnet, or the coral spring Mycena, is a species of fungus in the family Mycenaceae. It is found in Asia, the Caribbean, North America and Europe. The fruit bodies, or mushrooms, of the fungus grow on dead twigs and other woody debris of forest floors, especially along streams and other wet places. They have small orange-red caps, up to 1 cm (0.4 in) in diameter, held by slender yellowish stems up to 6 cm (2.4 in) long. The gills are pale yellow with a whitish edge. Several other Mycena species look similar, but may be distinguished by differences in size and/or microscopic characteristics. M. acicula is considered inedible because of its small size.

<i>Atheniella adonis</i> Species of fungus

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<i>Atheniella flavoalba</i> Species of fungus

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<i>Dendrocollybia</i> Genus of fungi in the family Tricholomataceae

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<i>Mycena intersecta</i> Species of fungus

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<i>Mycena nidificata</i> Species of fungus

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<i>Mycena aurantiomarginata</i> Species of fungus in the family Mycenaceae common in Europe and North America

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<i>Collybia tuberosa</i> Species of fungus

Collybia tuberosa, commonly known as the lentil shanklet or the appleseed coincap, is an inedible species of fungus in the family Tricholomataceae, and the type species of the genus Collybia. Like the two other members of its genus, it lives on the decomposing remains of other fleshy mushrooms. The fungus produces small whitish fruit bodies with caps up to 1 cm (0.4 in) wide held by thin stems up to 5 cm (2.0 in) long. On the underside of the cap are closely spaced white gills that are broadly attached to the stem. At the base of the stem, embedded in the substrate is a small reddish-brown sclerotium that somewhat resembles an apple seed. The appearance of the sclerotium distinguishes it from the other two species of Collybia, which are otherwise very similar in overall appearance. C. tuberosa is found in Europe, North America, and Japan, growing in dense clusters on species of Lactarius and Russula, boletes, hydnums, and polypores.

<i>Collybia cookei</i> Species of fungus

Collybia cookei is a species of fungus in the family Tricholomataceae, and one of three species in the genus Collybia. It is known from Europe, Asia, and North America. The fungus produces fruit bodies that usually grow on the decomposing remains of other mushrooms, like Meripilus giganteus, Inonotus hispidus, or species of Russula; occasionally fruit bodies are found on rich humus or well-decayed wood. The fungus produces small white mushrooms with caps up to 9 mm (0.35 in) in diameter, supported by thin stems that originate from a yellowish-brown sclerotium. The mushroom is difficult to distinguish from the other two species of Collybia unless an effort is made to examine the sclerotia, which is usually buried in the substrate. The edibility of the mushroom has not been determined.

<i>Marasmius funalis</i> Species of fungus

Marasmius funalis is a species of Marasmiaceae fungus known only from Japan. The species produces small mushrooms with reddish-brown caps up to 6 millimetres (0.24 in) in diameter and dark-brown, threadlike stems of up to 50 millimetres (2.0 in) in length. The species has a number of distinctive microscopic features, including very long cystidia on the stem, visible as bristles. Described in 2002 by Haruki Takahashi, the species grows on dead wood. The closest relative of M. funalis is M. liquidambari, known from Mexico and Papua New Guinea, and it is also similar in appearance to M. hudonii and Setulipes funaliformis, the latter of which was named after M. funalis.

<i>Hygrophorus olivaceoalbus</i> Species of fungus

Hygrophorus olivaceoalbus, commonly known as the olive wax cap or sheathed waxy cap, is a species of fungus in the genus Hygrophorus. The fruit bodies (mushrooms) appear from midsummer to late autumn under conifers in North American and Eurasian mountain forests. The mushrooms have olive-brown, slimy caps with dark streaks and a dark umbo; the caps measure 3 to 12 cm in diameter. Other characteristic features include a slimy stem up to 12 cm long that is spotted with ragged scales up to a ring-like zone. As its name implies, the mushroom has a waxy cap and gills. It is native to North America and across the northern regions of Europe. According to a publication by the Council of Europe, the fungus is nearly extinct in France.

<i>Pholiota nubigena</i> Species of fungus

Pholiota nubigena, commonly known as the gastroid pholiota or the bubble gum fungus, is a species of secotioid fungus in the family Strophariaceae. It is found in mountainous areas of the western United States, where it grows on rotting conifer wood, often fir logs. It fruits in spring, often under snow, and early summer toward the end of the snowmelt period in high mountain forests. Fruit bodies appear similar to unopened mushrooms, measuring 1–4 centimetres tall with 1–2.4 cm diameter caps that are whitish to brownish. They have a short but distinct whitish stipe that extend through the internal spore mass (gleba) of the fruit body into the cap. The gleba consists of irregular chambers made of contorted gills that are brownish in color. A whitish, cottony partial veil is present in young specimens, but it often disappears in age and does not leave a ring on the stipe.

<i>Stropharia caerulea</i> Species of fungus

Stropharia caerulea, commonly known as the blue roundhead, is a species of mushroom forming fungus in the family Strophariaceae. It is a somewhat common species found in Europe and North America, where it grows as a saprophyte in meadows, roadsides, hedgerows, gardens, and woodchip mulch. S. caerulea was officially described to science in 1979, although it was known to be a distinct species for about two centuries before that. The scientific name Stropharia cyanea, as defined by Tuomikoski in 1953, and used by several later authors, is a synonym of S. caerulea.

<i>Collybiopsis confluens</i> Species of fungus

Collybiopsis confluens, commonly known as the clustered toughshank, is a type of mushroom from the Omphalotaceae family. The fruiting body appears from summer until autumn in deciduous and coniferous forests. Collybiopsis confluens is not an edible mushroom.

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