Clitocybe amarescens

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Clitocybe amarescens
Clitocybe.amarescens.-.lindsey.jpg
Clitocybe amarescens from Commanster, Belgium
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Clitocybaceae
Genus: Clitocybe
Species:
C. amarescens
Binomial name
Clitocybe amarescens
Harmaja (1969)
Synonyms [1]
  • Lepista amarescens(Harmaja) Harmaja (1976)
  • Clitocybe nitrophila Bon (1979) [2]
  • Clitocybe amarescens var. nitrophila(Bon) E.Ludw. (2012)
Clitocybe amarescens
Information icon.svg
Gills icon.png Gills on hymenium
Convex cap icon.svgDepressed cap icon.svg Cap is convex or depressed
Decurrent gills icon2.svg Hymenium is decurrent
Bare stipe icon.svg Stipe is bare
Transparent spore print icon.svg
Transparent spore print icon.svg
Spore print is buff to cream
Mycomorphbox Question.pngEdibility is unknown

Clitocybe amarescens is a species of agaric fungus in the family Tricholomataceae. Widely distributed in northwestern Europe, it was first described in 1969 by Finnish mycologist Harri Harmaja. [3] It fruits in groups or in fairy rings in grasslands. [4] Amarescens signifies "tending to bitterness". [5]

Contents

Description

The cap of this mushroom measures 3-6 cm across, and is hygrophanous, coloured grey-brown when moist, and pale brown when dry. Initially, the shape is convex with an inrolled margin, though it flattens out and becomes depressed with age. In young specimens, the cap is darker and can have a powdery appearance (pruinescence), though its surface is smooth. [3] [6]

The stipe is a similar colour to the cap when moist, though darker when dry and is solid at first, though it becomes hollow with age. It is cylindrical, and its base is covered in densely matted hairs (tomentum), though rarely, it also has inconspicuous rhizoids too. [3]

The gills are moderately decurrent, attached to the stipe at a 15-45° angle. They are pale brown when moist, though when dry, more or less the same colour as the cap. They are crowded and thickest in the middle, and occasionally forked at the stipe. [6]

The odour of the mushroom is "mushroom-like" though the older specimens can smell reminiscent of Cystoderma carcharias. The caps of adult specimens taste slightly bitter, though their stipes and younger specimens taste mushroom-like. [3]

Microscopic details

The spores measure 6.4 -9.4 x 3.1-4.8 μm. they are congophilus and cyanophilous. They have an obtuse base, and range from elliptical to oblong in shape. The spores contain one large and a couple smaller guttules. The spore print is pale yellow to cream. The apiculus (part of spore which attaches to the sterigmata) measures 0.6-0.9 x 0.5-0. 6 μm. The basidia usually have 4 spores each, but sometimes, they only have 2. [3]

The epicutis of the cap is 40-80 μm thick. Cheilocystidia are absent. Clamp connections are present in all tissue. [6]

Ecology

In southwest Finnland, Clitocybe amarescens grows in rows, groups or clusters in moist or occasionally dry coniferous heath forests. They grow in Picea needle litter and sometimes in heaps of straw. They are often found alongside Pleurozium or Hylocomium mosses. They grow throughout October in the eastern areas of southwest Finland. They are common throughout northwest Europe, where they grow from September to January, and additionally in nutrient rich grasslands. [3] [6]

Similar Species

C. metachroa has a less infundibuliform and striped cap, and paler gills as well as having a different ecology. Clitocybe stercoraria has a greenish grey tint instead of brown. [6]

Underside Clitocybe.amarescens2.-.lindsey.jpg
Underside

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References

  1. "GSD Species Synonymy: Clitocybe amarescens Harmaja". Species Fungorum. CAB International. Retrieved 2015-08-07.
  2. Bon M. (1978). "Tricholomataceae de France et d'Europe occidentale - 5 - (Sous-famille Leucopaxilloideae (Singer) Bon)". Documents Mycologiques (in French). 9 (33): 1–79 (see p. 43).
  3. 1 2 3 4 5 6 Harmaja H. (1969). "The genus Clitocybe (Agaricales) in Fennoscandia". Karstenia. 10: 5–168 (see p. 98). doi: 10.29203/ka.1969.62 .
  4. Bas C, Kuyper TW, Noordeloos ME (1995). Flora Agaricina Neerlandica. Vol. 3. CRC Press. p. 61. ISBN   978-90-5410-616-6.
  5. Charlton T. Lewis (1879). A Latin Dictionary. Clarendon Press. ISBN   978-1-99-985578-9.
  6. 1 2 3 4 5 Van Crevel, Ruth (1995). Flora Agaricina Neerlandica - 3. Taylor & Francis. p. 61. ISBN   9789054106166.