Leucoagaricus_meleagris

<i>Leucoagaricus meleagris</i>

Leucoagaricus meleagris

Species of fungus

Leucoagaricus meleagris is a species of fungus in the family Agaricaceae.[1][2]

Quick Facts Leucoagaricus meleagris, Scientific classification ...

Taxonomy

It was first described in 1799 by the British mycologist James Sowerby who classified it as Agaricus meleagris and illustrated it in volume II of 'Coloured Figures of English Fungi or Mushrooms'.[3] Sowerby stated that the specimens were found in a hot-bed by Lady Arden on May 24 1798.[4]

In 1821 the species was reclassified as Gymnopus meleagris by the British mycologist Samuel Frederick Gray and the common name Turkey-fowl naked-foot was suggested.[5]

In 1887 it was reclassified as Lepiota meleagris by the Italian mycologist Pier Andrea Saccardo.[6]

In 1891 it was included in the German botanist Otto Kunze's exhaustive list of reclassifications as Mastocephalus biornatus,[7] however Kunze's Mastocephalus genus, along with most of 'Revisio generum plantarum' was not widely accepted by the scientific community of the age and so this classification was not accepted and nothing remains in this genus.

In 1936 it was reclassified as Hiatula meleagris by the German mycologist Rolf Singer[8] and then as Leucocoprinus meleagris by Marcel Locquin in 1945.[9] In 1949 Singer reclassified it as Leucoagaricus meleagris.[10]

Sclerotia

Included in the taxonomy of this species by some sources[1] is that of a Cenococcum species which was suspected to be an asexual morph of this species. However there are issues with these classifications and it is not clear if this species actually produces sclerotia although some Leucoagaricus and Leucocoprinus species do.

In 1829 the Swedish mycologist Elias Magnus Fries described the novel species Cenococcum xylophilum which he described as being similar to Cenococcum geophilum in appearing like small black vetch seeds that are found beneath the soil. The exterior of C. xylophilum was noted as differing in the pale purple floccose (woolly) coating and the white-floury interior.[11]

This was reclassified as Coccobotrys xylophilus in 1900 by the French mycologists Jean Louis Émile Boudier and Narcisse Théophile Patouillard who described the species as having ochre-yellow mycelium producing numerous round, 1-2mm wide structures with a hard outer surface of the same colour as the mycelium. When dissected there is a black layer beneath the exterior and then a red layer of a similar thickness beneath that, finally with a pale ochre centre that may tinge red or become whitish when dry. In this interior section are the sclerotic cells along with short hyphae similar to those surrounding the exterior. The species was found growing amongst tanbark in a hothouse in Angers, France that was growing palm trees.[12]

In 1900 Charles van Bambeke classified Coccobotrys xylophilus as the mycelium and asexual morph of Lepiota meleagris.[13] However the description of Coccobotrys xylophilus given by Boudier and Patouillard appears to significantly differ from that of Fries' Cenococcum xylophilum in colouration. Else Vellinga suggested that the material examined by Boudier and Patouillard and then later Bambeke was not the same as the original collection of Cenococcum xylophilum and so this reclassification had to be rejected. Coccobotrys chilensis however was reclassified as Leucoagaricus chilensis.[14]

The description of the sclerotia given by Boudier and Patouillard may be similar to that of the sclerotia of Leucocoprinus birnbaumii.

Description

Leucoagaricus meleagris is a small dapperling mushrooms with white flesh in the cap and brown flesh in the stem.[15]

Cap: 2-4.5cm wide, starting hemispherical before expanding to campanulate (bell shaped) then plano-convex with a broad umbo. The surface background is white and covered with brownish-red coarse fibrils and scales. The surface discolours to a dirty red with age or when bruised. This can occur just from handling it. Stem: 6-8cm long with a clavate taper up from the slightly wider base. The surface is white with a fibrillose coating and also discolours brownish-red when old or bruised. The white, ascending stem ring has reddish scales on the underside and is located towards the top of the stem (superior) but it may disappear. Gills: Free, crowded and white but discolouring like the rest of the mushroom so may be yellowish or brownish with age. Spore print: White. Spores: Ellipsoid with a somewhat thick wall and tiny germ pore. Smooth. Hyaline. Dextrinoid. 8-11 x 6-8 μm. Basidia: Four spored. Taste: Slightly farinaceous (floury). Smell: Indistinct.[15][16]

Quick Facts Leucoagaricus meleagrisMycological characteristics ...
  • James Sowerby's illustration, 1799

Habitat and Distribution

Leucoagaricus meleagris grows in small groups and tufts in the Autumn. It is reported as being widespread but rarely recorded in the United Kingdom.[15] In the early taxonomy of this species the observations are from greenhouses and amongst bark beds in hothouses so it may be more common in these warm environments. It has also been documented more recently from woodchips in England[17] and Skåne, Sweden[18] as well as in greenhouses in Warsaw, Poland.[16] Observations of it appear to be uncommon in Europe with the most common locations for purported observations being the East Coast of the United States.[19]

Similar species

  • Leucoagaricus americanus may appear similar, grow in the same human-made environments and exhbits similar yellow and then red staining when handled. These species may be confused in books.[18] Leucoagaricus meleagris can be distinguished by the smaller size of the mushrooms and different cap surface.[20]

References

  1. [1]
    "Species fungorum - Leucoagaricus meleagris (Gray) Singer, Lilloa 22: 422 (1951)". www.speciesfungorum.org. Retrieved 2022-07-19.
  2. [2]
    "Mycobank Database - Leucoagaricus meleagris".
  3. [3]
    Sowerby, James (1799). Coloured figures of English fungi or mushrooms. London: Printed by J. Davis.
  4. [4]
    Sowerby, James (1797). Coloured figures of English fungi or mushrooms. London: Printed by J. Davis.
  5. [5]
    Gray, Samuel Frederick; Gray, John Edward; Shury, James (1821). A natural arrangement of British plants : according to their relations to each other as pointed out by Jussieu, De Candolle, Brown, &c. Vol. 1. London: Baldwin, Cradock, and Joy.
  6. [6]
    Saccardo, P. A.; Traverso, G. B.; Trotter, A. (1887). Sylloge fungorum omnium hucusque cognitorum. Vol. 5. Patavii: sumptibus auctoris.
  7. [7]
    Kuntze, Otto (1891). Revisio generum plantarum:vascularium omnium atque cellularium multarum secundum leges nomenclaturae internationales cum enumeratione plantarum exoticarum in itinere mundi collectarum ... Vol. 2. Leipzig: A. Felix [etc.] p. 860.
  8. [8]
    Singer, Rolf (1936). "Bemerkungen über einige Basidiomyceten". Annales Mycologici. 34: 431–432 – via www.cybertruffle.org.uk.
  9. [9]
    Locquin, Marcel (1945). "Notes sur les Lépiotes II (suite)". Publications de la Société Linnéenne de Lyon. 14 (5): 93. doi:10.3406/linly.1945.13215.
  10. [10]
    Singer, Rolf (1949). "The Agaricales (Agaricaceae)". Lilloa. 22: 422 – via www.lillo.org.ar.
  11. [11]
    Fries, Elias (1821). Systema mycologicum : sistens fungorum ordines, genera et species, huc usque cognitas, quas ad normam methodi naturalis determinavit. Vol. 3. Lundae: Ex Officina Berlingiana. pp. 65–67.
  12. [12]
    Boudier, MM.; Patouillard, Narcisse Théophile (1900). "Note sur deux Champignons hypogés". Bulletin de la Société mycologique de France. 16. Epinal: La Société: 141–144 – via www.biodiversitylibrary.org.
  13. [13]
    van Bambeke, Ch (1900). "Le Coccobotrys xylophilus (Fr.) Boud. et Pat. (=Cenoccoum xylophilum Fr.) est le Mycélium du Lepiota meleagris (Sow.) Sacc". Bulletin de la Société royale de botanique de Belgique. 39. [Bruxelles]: 81–88 – via www.biodiversitylibrary.org.
  14. [14]
    Stalpers, Joost A.; Redhead, Scott A.; May, Tom W.; Rossman, Amy Y.; Crouch, Jo Anne; Cubeta, Marc A.; Dai, Yu-Cheng; Kirschner, Roland; Langer, Gitta Jutta; Larsson, Karl-Henrik; Mack, Jonathan; Norvell, Lorelei L.; Oberwinkler, Franz; Papp, Viktor; Roberts, Peter (2021-08-11). "Competing sexual-asexual generic names in Agaricomycotina (Basidiomycota) with recommendations for use". IMA Fungus. 12 (1): 16. doi:10.1186/s43008-021-00061-3. ISSN 2210-6359. PMC 8359032. PMID 34380577.
  15. [15]
    Buczacki, Stefan (2012). Collins fungi guide. London: Collins. ISBN 978-0-00-724290-0. OCLC 793683235.
  16. [16]
    Szczepkowski, Andrzej; Gierczyk, Błażej; Kujawa, Anna; Dobrzyński, Piotr (2022-05-08). "Macrofungal diversity of greenhouses at the Warsaw University Botanic Garden". Ecological Questions. 33 (2): 95–100. doi:10.12775/eq.2022.018. ISSN 1644-7298.
  17. [17]
    Mattock, Graham (2019). "A recent record of Leucoagaricus meleagris from Hampshire". Field Mycology. 20 (4): 135–136. doi:10.1016/j.fldmyc.2019.09.010. S2CID 208599376.
  18. [18]
    Lange, Christian (2005). "Släktet Leucoagaricus, spånskivlingar, i Sverige" (PDF). Svensk Mykologisk Tidskrift. 26 (2): 16–30.
  19. [19]
    "Mushroom Observer". mushroomobserver.org. Retrieved 2022-07-11.
  20. [20]
    Flora agaricina neerlandica : critical mongraphs on families of agarics and boleti occurring in the Netherlands. C. Bas. Lisse [Netherlands]: A.A. Balkema Publishers. 1999. ISBN 90-6191-861-8. OCLC 48399194.{{cite book}}: CS1 maint: others (link)
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