Collybiopsis confluens

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Clustered toughshank
Gymnopus.confluens.-.lindsey.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Omphalotaceae
Genus: Collybiopsis
Species:
C. confluens
Binomial name
Collybiopsis confluens
Synonyms
  • Marasmiellus confluens [1]
  • Gymnopus confluens [2]
  • Collybia confluens [2]
  • Marasmius archyropus [3]
  • Agaricus confluens

Collybiopsis confluens, [4] commonly known as the clustered toughshank, is a type of mushroom from the Omphalotaceae family. [1] The fruiting body appears from summer until autumn in deciduous and coniferous forests. Collybiopsis confluens is not an edible mushroom.

Traits

Macroscopic traits

The thin-fleshed cap is 1.5–4 cm (0.59–1.57 in) wide, arched or flattened, and more or less convex. The cap is smooth, matte and faintly ochre or faintly brown depending on humidity. The colours turn pale to a whiteish tone when the cap is dry. Mature fruiting bodies have a wavy and slightly grooved edge.

The lamella are strikingly tightly packed and almost exposed. In early stages, they are whiteish and later turn from a cream to leather-yellow or pink-brownish colour. The spore powder is white.

The stem can be up to 10 cm (3.9 in) long, stiff, hollow, smooth and grooved along its length. It is red-brownish coloured and purple-grey and frosted with fine flakes. The tip of the stem is expanded, resembling a button, at the base of the gills. The base is covered with a white felty mycelium weave. The thin, tough flesh is cream-brownish and gives off a weak, aromatic mushroom scent. Its taste is described as mild. [5] [6]

Microscopic traits

The smooth, inamyloid spores are 7–10 μm long and 3.5–4.2 (–5) μm wide. They are slightly tear-shaped, ellipsoid or spindle shaped. They are not cyanophilic, meaning that they cannot be dyed with methyl blue. The club-shaped, basidia containing four spores are 22.4–26.6 μm × 5–7 μm big. Pleurocystidia are absent, but there are many 27.5–70 μm long and 2.8–5.6 μm wide cheilocystidia. They are unevenly club- or cylinder-shaped and twisting. In some instances, they can be unevenly battered or branched like coral. The inamyloid Lamellartrama is parallel to interwoven. The hypha are 3.5–7.8 (–14.8) μm wide, smooth, thin-walled and translucent. They partially contain strongly refractive lipid droplets. The Huttrama is inamyloid and loosely interwoven. The Hyphen are 5.5–13.2 μm wide. The skin of the cap (Pileipellis) is only slightly differentiated and consists of crawling, branched, and radially orientated hyphen. The hyaline and thin walled cells are 2.8–7 μm wide and mostly smooth. Occasionally, they can be spirally and unevenly encrusted by a fine, faint yellow-brown pigment. Clamp connections are present in all tissues. [5] [7]

Differentiation

Amateurs would find it easy to confuse Collybiopsis confluens with other types of mushrooms. Characteristic of this species are the narrow-

Collybiopsis confluens
Information icon.svg
Gills icon.png Gills on hymenium
Convex cap icon.svgFlat cap icon.svg Cap is convex or flat
Adnate gills icon2.svgFree gills icon2.svg Hymenium is adnate or free
Bare stipe icon.svg Stipe is bare
Transparent spore print icon.svg
Transparent spore print icon.svg
Spore print is yellow to white
Mycomorphbox Question.pngMycomorphbox Inedible.pngEdibility is unknown or inedible

standing lamellae, the thin-fleshed, reddish-brown and quickly-fading cap and the tough, gristly stem, which is usually noticeably hairy and quite long in relation to the diameter of the cap. The tufted growth is also typical for this species.

Gymnopus peronatus can be similar. This also has lamella far apart from each other, yellow lamella when the mushroom is young, light brown lamellae when the mushroom is old, tastes burning hot and grows fewer tufts.

Ecology

This species appears in almost every native forest, as well as in common forest communities. They mainly contain adult copper beeches. The fruiting body appears from July to November mostly in rows of clusters or fairy circles from 1 to 5 meters in diameter. As a substrate, deciduous and coniferous trees serve very well, however they grow most frequently on copper beech wood. The mushrooms appear from lowland to high mountain land. [8]

Distribution

Collybiopsis confluens is widely spread throughout Pakistan and the Holarctic realm. In the Holoartic realm, the distribution area reaches from the meridian to the subarctic climate zone. The species has been documented in North Asia (Caucasus, Eastern Siberia, Kamchatka, China, Korea, Japan), North America (USA, Canada), and Europe. In Europe the mushroom is distributed from Spain in the South to Macedonia in the South-East. In western Europe they can be found in France, Great Britain, in the Benelux countries and northwards to the Hebrides. They appear throughout all of middle Europe, east Europe, Ukraine, Belarus and Russia. They can also be found throughout all of Fennoscandia. In the north, its distribution area reaches Sweden and Finland, to beyond the arctic circle. [9] [10]

Classification

The mushroom was first classified as Agaricus confluens by Christian Hendrik Persoon in 1796. In 1828, Persoon re-classified this species under the name of Agaricus archyropus. In 1828, Elias Magnus Fries gave the mushroom the name Maramius archyropus and so put it in the genus Marasmius . [11] Indeed, he used also the younger epithet archyropus, although the older epithet confluens through the designation took precedence. This was corrected in 1898 by P. Karsten, who gave the species the name Marasmius confluens and so used the older epithet for the classification into the genus Marasmius.

In 1871, Paul Kummer placed the mushroom as Collybia confluens in the genus Collybia [12] and in 1898 the species was classified as Chamaeceras archyropus by Otto Kuntze in the newly-founded (by Kuntze) genus of Chamaeceras. [13]

For a long time, the species was labelled as Collybia confluens, following Paul Kummer. This name is still in use today. In 1997, V. Antonìn, R. Halling and M. Noordeloos placed the species in the genus Gymnopus . [14] Genetic studies show however, that Collybiopsis confluens is more closely related to Marasmiellus ramealis (type species of the genus Marasmiellus) than Gymnopus fusipes (type species of the genus Gymnopus) and therefore was classified in the genus Marasmiellus. [1]

In 2021, the Marasmiellus-species, including Marasmiellus ramealis as former type species and Marasmiellus confluens, was transferred to the 1909-established genus Collybiopsis. [4]

Etymology

The Latin epithet confluens means "to flow together" or "to flow into each other". [15]

Relevance

The mushroom is not edible, [6] even though it likely contains no poison. Due to the tough, cartilaginous stalk and the thickness of its flesh, it is hardly used for this purpose.

Related Research Articles

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

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<i>Rhodocollybia</i> Genus of fungi

Rhodocollybia is a genus of Basidiomycete mushroom. Species in this genus, formerly classified as a subgenus in Collybia, have fairly large caps, and have a pinkish-tinted spore print. Microscopically, they are characterized by having spores and basidia that are dextrinoid—staining deep reddish to reddish-brown with Melzer's reagent when tested for amyloidity. Rhodocollybia species are commonly found in temperate North America and Europe, and infrequently in Central and South America.

<i>Collybia</i> Genus of fungi

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<i>Galerina sulciceps</i> Species of fungus

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<i>Gymnopus</i> Genus of fungi

Gymnopus is a genus of fungus in the family Omphalotaceae. The genus has a widespread, cosmopolitan distribution and contains about 300 species.

<i>Mycetinis</i> Genus of fungi

Mycetinis is a genus of fungus in the Omphalotaceae family, containing about eight species formerly classified in Marasmius.

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

Marasmius rotula is a common species of agaric fungus in the family Marasmiaceae. Widespread in the Northern Hemisphere, it is commonly known variously as the pinwheel mushroom, the pinwheel marasmius, the little wheel, the collared parachute, or the horse hair fungus. The type species of the genus Marasmius, M. rotula was first described scientifically in 1772 by mycologist Giovanni Antonio Scopoli and assigned its current name in 1838 by Elias Fries.

<i>Crinipellis zonata</i> Species of fungus

Crinipellis zonata, commonly known as the zoned Crinipellis or the zoned-cap Collybia, is a species of gilled mushroom in the family Marasmiaceae. Though considered a little brown mushroom of unknown edibility, it is distinctive because of its thick covering of coarse hairs, and differentiated from other members of Crinipellis by its slightly larger cap size, which reaches up to 25 mm (1.0 in) in diameter. The white gills on the underside of the cap are crowded closely together, and are free from attachment to the stem. Saprobic, it grows on the dead wood of deciduous trees from late summer to autumn. The fungus is found commonly in eastern North America, but has also been collected in Portugal and Korea. The variety C. zonata var. cremoricolor, found in eastern North America, may be distinguished microscopically by its longer spores.

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

Mycena intersecta is a species of mushroom in the family Mycenaceae. First reported as a new species in 2007, it is known only from central Honshu, in Japan, where it is found growing solitarily or scattered, on dead leaves in lowland forests dominated by oak. The mushrooms have olive-brown caps up to 12 mm (0.47 in) in diameter atop slender stems that are 50 to 80 mm long by 0.7 to 1.2 mm thick. On the underside of the cap are the distantly spaced, whitish gills that have cross-veins running between them. Microscopic characteristics of the mushroom include the smooth, irregularly cylindrical cheilocystidia, the absence of pleurocystidia, the diverticulate elements of the cap cuticle, the broadly club-shaped to irregularly shaped caulocystidia, the weakly dextrinoid flesh, and the absence of clamp connections. The edibility of the mushroom is unknown.

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

Mycena nidificata is a species of fungus in the family Mycenaceae of the Agaricales. First collected in 2000 and reported as a new species in 2007, it is known only from Kanagawa, Japan, where it grows on the floor of oak forests. The dark brown irregularly wrinkled cap measures up to 25 mm (1.0 in) in diameter. The cap is supported by a thin stem up to 50 mm (2.0 in) long, which is covered at the base by a whitish hairlike growth, and attached to white, cord-like rhizomorphs—aggregations of mycelium that resemble plant roots. The underside of the cap features thin, distantly spaced grayish gills that have distinct veins running between them. At a microscopic level, distinguishing characteristics include the inamyloid spores, the club-shaped cheilocystidia with finger-like appendages, the diverticulate cells in the outer layer of cap and stem, and the presence of clamp connections.

<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 cirrhata</i> Species of fungus

Collybia cirrhata is a species of fungus in the family Tricholomataceae of the order Agaricales. 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 in diameter, narrow white gills, and slender whitish stems 8–25 mm 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.

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

Marasmius sasicola is a species of Marasmiaceae fungus known from Kanagawa Prefecture, Japan. First collected in 2000, it was described in 2002 by Haruki Takahashi. The species produces small mushrooms with white caps and very short, very thin black stems. Unlike in other, similar species, the stems enter the plant matter on which the mushroom grows. The six to eight white gills are spread out around the cap, and all of them reach the stem. The flesh has no taste or odour. Found in June, the species grows on dead Sasa leaves, from which it takes its specific epithet.

<i>Rhodocollybia butyracea</i> Species of fungus

Rhodocollybia butyracea, commonly known as the buttery collybia, is a species of fungus in the mushroom family Omphalotaceae. It has a number of subspecies.

<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>Marasmius tageticolor</i> Species of fungus

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

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

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References

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  13. Otto Kuntze (1898). Revisio generum plantarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum (in German). Vol. Pars 3 / 2. Paris: Bibliothèque nationale de France. p. 455.
  14. V. Antonín; R.E. Halling; M.E. Noordeloos (1997), "Generic concepts within the groups of Marasmius and Collybia sensu lato.", Mycotaxon (in German), vol. 63, pp. 359–368
  15. Gottlieb-Wilhelm Bischoff (1834). Lehrbuch der Botanik. Vol. 2. Retrieved 10 April 2012.