Rhizomarasmius
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Rhizomarasmius
''Rhizomarasmius'' is a genus of fungi in the family Physalacriaceae, containing about five species. General The genus was created in 2000 by Ron Petersen, R. H. Petersen to accommodate two species then classified in Marasmius (''M. pyrrhocephalus'' and ''M. undatus''), but which do not belong there due to morphological grounds, including the nature of the Cystidium, cystidia and the way the mushrooms are rooted on a plant substrate. This analysis was backed up in 2006 by DNA comparisons done by Wilson and Desjardin. Unlike most ''Marasmius'' mushrooms, members of ''Rhizomarasmius'' grow on the rhizomes of ferns or flowering plants, and that is the signification of the genus name. Instead of the Marasmiaceae this genus is placed in the Physalacriaceae, a sister clade but a separate family. Species See also *List of Agaricales genera References

Rhizomarasmius, Agaricales genera Physalacriaceae Taxa named by Ron Petersen {{Physalacriaceae-stub ...
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Rhizomarasmius Oreinus
''Rhizomarasmius'' is a genus of fungi in the family Physalacriaceae, containing about five species. General The genus was created in 2000 by R. H. Petersen to accommodate two species then classified in Marasmius (''M. pyrrhocephalus'' and ''M. undatus''), but which do not belong there due to morphological grounds, including the nature of the cystidia and the way the mushrooms are rooted on a plant substrate. This analysis was backed up in 2006 by DNA comparisons done by Wilson and Desjardin. Unlike most ''Marasmius'' mushrooms, members of ''Rhizomarasmius'' grow on the rhizomes of ferns or flowering plants, and that is the signification of the genus name. Instead of the Marasmiaceae this genus is placed in the Physalacriaceae, a sister clade but a separate family. Species See also *List of Agaricales genera This is a list of fungal genus, genera in the order (biology), order Agaricales. The list follows Kalichman, Kirk & Matheny (2020), with more recent additions and amend ...
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Rhizomarasmius
''Rhizomarasmius'' is a genus of fungi in the family Physalacriaceae, containing about five species. General The genus was created in 2000 by Ron Petersen, R. H. Petersen to accommodate two species then classified in Marasmius (''M. pyrrhocephalus'' and ''M. undatus''), but which do not belong there due to morphological grounds, including the nature of the Cystidium, cystidia and the way the mushrooms are rooted on a plant substrate. This analysis was backed up in 2006 by DNA comparisons done by Wilson and Desjardin. Unlike most ''Marasmius'' mushrooms, members of ''Rhizomarasmius'' grow on the rhizomes of ferns or flowering plants, and that is the signification of the genus name. Instead of the Marasmiaceae this genus is placed in the Physalacriaceae, a sister clade but a separate family. Species See also *List of Agaricales genera References

Rhizomarasmius, Agaricales genera Physalacriaceae Taxa named by Ron Petersen {{Physalacriaceae-stub ...
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Rhizomarasmius Undatus
''Rhizomarasmius undatus'' ( syn. ''Marasmius undatus'') is a small mushroom which grows on fern rhizomes. Description The species can be described as follows: *The cap has a powdery covering (a pruina), is initially whitish and convex and later becomes brownish grey and expands to be flat. It grows to about 2.5 cm in diameter. *The gills are whitish and distant, and broadly adnate to the stem, or slightly decurrent. The spore powder is white. *The rigid stem can grow to about 12 cm long by about 2 mm in diameter. It is white at the top and dark brown to black lower down, with a puinose covering of short white hairs. *The smell and taste are not distinctive. *The spores are lemon-shaped to ellipsoid and measure roughly 9-12 μm x 5-7 μm. Naming and related species The species epithet ''undatus'', meaning "wavy", is the past participle of the Latin verb "undo" (= "I undulate"). This species was originally described in 1836 as ''Agaricus undatus'' by M ...
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Rhizomarasmius Epidryas
''Rhizomarasmius epidryas'' ( syn. ''Marasmius epidryas'' or ''Mycetinis epidryas'') is one of a group of mushrooms formerly in the genus ''Marasmius''. It grows amongst dwarf shrubs of the genus ''Dryas'' in arctic or high mountain environments. Description The species can be described as follows: *The cap is brownish yellow and grows to about 1 cm in diameter. *The gills are white and fairly distant, and broadly attached to the stem. The spore powder is white. *The stem can grow to 4 cm tall by up to 2 mm in diameter, being broader at the apex. It is brown above and blackish brown at the base, with a velvety covering of hairs. *The smell and taste are not distinctive. *The spores are roughly ellipsoid or almond-shaped and measure roughly 8.5-10.5 μm x 5-7 μm. Naming and related species The species epithet is the Ancient Greek prefix "epi-" (ἐπί), meaning "on", followed by Dryas, the genus of plants with which it grows. This species was o ...
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Rhizomarasmius Setosus
''Rhizomarasmius setosus'' ( syn. ''Marasmius setosus'' or ''Marasmius recubans'') is a tiny whitish mushroom having a distinctive hairy stem. It has been given the vernacular name "Beechleaf Parachute". Description The species can be described as follows: *The white cap is initially hemispherical and later flat. It grows to about 0.5 cm in diameter. *The gills are white and distant, and either adnate or somewhat decurrent. The spore powder is white. *The stem can grow to 4 cm long but is very long and thin, being only about 0.5 mm in diameter. It is white at the top and red brown lower down, with long white hairs (up to 1 mm), at least near the base when young. *The smell and taste are not distinctive. *The spores are usually spindle-shaped, but can be ellipsoid, or almond-shaped and measure roughly 10–14.5 μm x 4-6 μm. Naming and related species The species epithet comes from the Latin adjective "saetosus" or "setosus", meaning "coarse ...
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Rhizomarasmius Pyrrhocephalus
''Rhizomarasmius pyrrhocephalus'' is a taxon of fungus. It serves as the type species of its genus. Taxonomy The genus ''Rhizomarasmius'' was split from ''Marasmius'' due to morphological differences such as the cystidia and the rooting stipe (hence the prefix ''rhizo''). ''Rhizomarasmius pyrrhocephalus'' is the type species''.'' Etymology The genus name is a combination of the prefix ''Rhizo'', from the Ancient Greek ῥίζα (''rhíza'', "root"), and the Greek ''marasmos'' (μαρασμός; "drying out; withering"). The specific epithet combines the Ancient Greek ''pyrrho'' (πῦρ • pyr; "fire") and ''cephalus'' ("head"). Description The orange-colored cap is wide. Its rooted black stipe has velvety hairs and is up to long. It has adnate gills and a white spore print, not unlike ''Marasmius'' species. Similar species It can resemble '' Marasmius sullivantii'', '' Marasmiellus biformis'' and '' M. subnudus''. Distribution and habitat This mushroom is ...
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Physalacriaceae
The Physalacriaceae are a family of fungi A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one ... in the order Agaricales. Species in the family have a widespread distribution, ranging from the Arctic, (''Rhizomarasmius''), to the tropics, e.g. ''Gloiocephala'', and from marine sites (''Mycaureola'') and fresh waters (''Gloiocephala'') to semiarid forests (''Xerula''). Description Most species in the Physalacriaceae form basidiocarp, fruit bodies with pileus (mycology), caps and stipe (mycology), stipes. They have a monomitic hyphal system (wherein only generative hypha are produced), and clamp connections are present in the hyphae. Basidia (spore-bearing cells) are club-shaped with two to four sterigmata. The basidiospores generally have ellipsoidal, spindle-like (fusiform), cylindric ...
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List Of Agaricales Genera
This is a list of fungal genus, genera in the order (biology), order Agaricales. The list follows Kalichman, Kirk & Matheny (2020), with more recent additions and amendments, as noted. The number of species in each family is taken from Catalogue of Life (2023) and is subject to change as new research is published. Many genera are not as yet assigned to a family and are listed under "incertae sedis". Genera * See also *List of Agaricales families References Notes References {{reflist, 2, refs= {{cite journal , last=Agerer , first=R. , year=1983 , title=Beitrag zur Flora cyphelloider Pilze aus der Neotropis V. Zwei neue Gattungen: ''Metulocyphella'' und ''Incrustocalyptella'' , journal=Zeitschrift für Mykologie , volume=49 , issue=2 , pages=155–164 , language=de , trans-title=Contribution to neotropical cyphelloid fungi V. Two new genera: ''Metulocyphella'' and ''Incrustocalyptella'' {{cite journal , last=Agerer , first=R. , year=1983 , title=Typusstudien an cyphelloiden Pil ...
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Marasmius Setosus A2 Detail
''Marasmius'' is a genus of mushroom-forming fungi in the family Marasmiaceae. It contains about 500 species of agarics, of which a few, such as ''Marasmius oreades'', are edible. However, most members of this genus are small, unimpressive brown mushrooms. Their humble appearance contributes to their not being readily distinguishable to non-specialists, and they are therefore seldom collected by mushroom hunters. Several of the species are known to grow in the characteristic fairy ring pattern. The author of the genus was Elias Magnus Fries, who in 1838 classified white-spored agarics having a tough central stipe in this taxon if they were marcescent, i.e. they could dry out but later revive when moistened. For Fries, marcescence—by contrast with the " putrescent" (decomposing) nature of most mushrooms—was an important character for classification, which he used to separate this group from genus ''Collybia'' (which has now been split into many newer genera). ...
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Marasmius
''Marasmius'' is a genus of mushroom-forming fungi in the family Marasmiaceae. It contains about 500 species of agarics, of which a few, such as '' Marasmius oreades'', are edible. However, most members of this genus are small, unimpressive brown mushrooms. Their humble appearance contributes to their not being readily distinguishable to non-specialists, and they are therefore seldom collected by mushroom hunters. Several of the species are known to grow in the characteristic fairy ring pattern. The author of the genus was Elias Magnus Fries, who in 1838 classified white-spored agarics having a tough central stipe in this taxon if they were marcescent, i.e. they could dry out but later revive when moistened. For Fries, marcescence—by contrast with the " putrescent" (decomposing) nature of most mushrooms—was an important character for classification, which he used to separate this group from genus '' Collybia'' (which has now been split into many newer gener ...
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