Leucocoprinus ianthinus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Agaricaceae
Genus: Leucocoprinus
Species:
L. ianthinus
Binomial name
Leucocoprinus ianthinus
(Sacc) P.Mohr (1994)
Synonyms[1]

Agaricus ianthinus Cooke (1888)
Lepiota ianthina Sacc (1891)
Lepiota lilacinogranulosa Henn. (1898)
Hiatula cepistipes var. lilacinogranulosa R. Heim & Romagn (1934)
Leucocoprinus lilacinogranulosus Locq. (1943)
Leucocoprinus ianthinus Locq. (1945)
Leucocoprinus lilacinogranulosus var. subglobisporus D.A. Reid (1989)
Leucocoprinus ianthinus var. subglobisporus Blanco-Dios (1989)

Leucocoprinus ianthinus is a species of mushroom producing fungus in the family Agaricaceae.[2][3] Like several other Leucocoprinus species it may have originated in a tropical climate but now finds a home in plant pots, greenhouses and compost piles in many countries. It is not seen in plant pots with the same kind of regularity as the well known Leucocoprinus birnbaumii and not seen in the wild as frequently as Leucocoprinus brebissonii.

Leucocoprinus ianthinus
View the Mycomorphbox template that generates the following list
Gills on hymenium
Cap is campanulate or flat
Hymenium is free
Stipe has a ring
Spore print is white
Ecology is saprotrophic
Edibility is unknown

Taxonomy

It was first described in 1888 by the English botanist and mycologist Mordecai Cubitt Cooke who classified it as Agaricus (Lepiota) ianthinus based on specimens collected in the hothouses of Kew Gardens (London, England) in 1888.[4] In 1891 the Italian mycologist Pier Andrea Saccardo reclassified it as Lepiota ianthinus or Lepiota janthina in the original text.[5] It was reclassified as Leucocoprinus ianthinus in 1945 by Marcel Locquin.[6]

An additional basionym was classified as Lepiota lilacinogranulosa or Lepiota lilacino-granulosa by the German mycologist Paul Christoph Hennings in 1898.[7] In 1934 the French botanists and mycologists Roger Heim and Henri Romagnesi reclassified it as a variant of Hiatula cepaestipes (now known as Leucocoprinus cepistipes).[8] The species was reclassified as Leucocoprinus lilacinogranulosa by Locquin in 1943.[9] This is now also considered a synonym of Leucocoprinus ianthinus[2][3] however some mycologists do consider them as separate, but similar looking species.[10]

Description

Leucocoprinus ianthinus is a small dapperling mushroom with thin white flesh.

Cap: 1.5-7cm, starting ovate/hemispherical before expanding to campanulate (bell shaped) with age with a prominent umbo and then plano-convex with age. The surface is whitish with a dark purple to reddish brown centre and purplish scales spreading across the cap but becoming sparse at towards the edges. The margins have striations that extend two thirds of the way across the cap or up to the umbo. They may split radially and discolour yellowish with age and it is common for them to curve inwards with age. Gills: Free, moderately crowded and white. Stem: 3.5-7cm long and 2-5mm wide tapering upwards from a slightly bulbous base and hollow interior. The surface is yellowish white towards the top of the stem, whitish below the ring and then with a violet to lilac fibrillose coating at the base and a white tomentous covering at the bulb. The white, ascending, stem ring has a purplish margin but may disappear. Spore print: White to pale lilac. Spores: A different range of sizes is given by different sources: 8–12 x 5.5–7.5 μm[11] or 6.5–10 x 5.75–6.5 μm[12] or 9.5-10.5 x 6.5-7 μm.[13] Ellipsoid to amygdaliform with a thick wall and a germ pore that is covered with a hyaline cap. Dextrinoid, congophilous and cyanophilous. In cresyl blue a pink colouration is visible in the inner wall of the spore. Basidia: 17–42 x 8–11 μm. Four spored or rarely two spored. Smell: fungal, strong and astringent. Taste: fungal.[11][12][13]

Similar species

  • Leucocoprinus brebissonii can appear similar but is distinguished by the darker brown colour of the centre disc and the white stem which lacks a purplish base. It is more commonly found in the wild rather than in plant pots.
  • Leucocoprinus heinemannii and some related, possibly undescribed species in the Heinemannii complex may appear similar but with black scales.
  • Leucocoprinus lilacinogranulosus[14] is considered a synonym for L. ianthinus however some sources suggest they may be separate species.[12][15]

References

  1. ↑ "GSD Species Synonymy: Leucocoprinus ianthinus (Sacc.) P. Mohr". Species Fungorum. CAB International. Retrieved 6 July 2022.
  2. 1 2 "Species fungorum – Leucocoprinus ianthinus (Sacc.) P. Mohr, Boletus 18(2): 48 (1994)". www.speciesfungorum.org. Retrieved 19 July 2022.
  3. 1 2 "Mycobank Database – Leucocoprinus ianthinus".
  4. ↑ Cooke, M. C.; Massee, George (1887–1888). "New British Fungi". Grevillea. London: Williams and Norgate. 16: 101.
  5. ↑ Saccardo, P. A.; Traverso, G. B.; Trotter, A. (1891). Sylloge fungorum omnium hucusque cognitorum. Vol. 9. Patavii: sumptibus auctoris. p. 10.
  6. ↑ Locquin, Marcel (1945). "Notes sur les Lépiotes II (suite)". Publications de la Société Linnéenne de Lyon. 14 (5): 94. doi:10.3406/linly.1945.13215.
  7. ↑ Hennings, P. (1898). "Die in den Gewächshäusern des Berl. bot. Gartns beobachteten Pilze". Verhandlungen des Botanischen Vereins für die Provinz Brandenburg. Berlin: Kommissions-Verlag von R. Gaertner. 40: 145.
  8. ↑ Heim, Roger; Romagnesi, Henri (1934). "Sur Quelques Agarics de la Flore Française". Bulletin trimestriel de la Société mycologique de France. 50: 184 – via gallica.bnf.fr.
  9. ↑ Locquin, Marcel (1943). "Étudie du développement des spores du genre Leucocoprinus Pat, (Troisième Partie) suivie de la description d'une espèce nouvelle et d'une espèce critique". Publications de la Société Linnéenne de Lyon. 12 (6): 95. doi:10.3406/linly.1943.9747.
  10. ↑ Gierczyk, Błażej; Dubiel, Grzegorz (30 June 2014). "Leucocoprinus lilacinogranulosus (Henn.) Locq. in Poland". Acta Mycologica. 49 (1): 59–67. doi:10.5586/am.2014.005. ISSN 2353-074X.
  11. 1 2 Noordeloos, Machiel; Wkuyper, T H; Vellinga, Else (1988). Flora Agaricina Neerlandica Critical monographs on families of agarics and boleti occurring in the Netherlands vol. 5. A.A. Balkema Publishers. pp. 80–81.
  12. 1 2 3 Reid, Derek A. (1989). "Notes on some Leucocoprinoid fungi from Britain". Mycological Research. 93 (4): 418. doi:10.1016/s0953-7562(89)80034-6. ISSN 0953-7562.
  13. 1 2 Buczacki, Stefan (2012). Collins fungi guide. London: Collins. ISBN 978-0-00-724290-0. OCLC 793683235.
  14. ↑ "Species Fungorum – Leucocoprinus lilacinogranulosus (Henn.) Locq., Bull. mens. Soc. linn. Soc. Bot. Lyon 12(6): 95 (1943)". www.speciesfungorum.org. Retrieved 21 July 2022.
  15. ↑ Gierczyk, Błażej; Dubiel, Grzegorz (30 June 2014). "Leucocoprinus lilacinogranulosus (Henn.) Locq. in Poland". Acta Mycologica. 49 (1): 59–67. doi:10.5586/am.2014.005. ISSN 2353-074X.
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