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Agaricus arvensis . Schaeff
Life   Fungi   Basidiomycota   Agaricaceae   Agaricus

Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis

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Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis
Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis

Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis
Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis

Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis
Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis

Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis
Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis

Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis
Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis

Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis
Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis

Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis
Agaricus arvensis
© Copyright Malcolm Storey 2011-2118 · 3
Agaricus arvensis

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FamilyScientific name @ source (records)
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California Fungi—Agaricus fissuratus Agaricus fissuratus
(Photo: © Fred Stevens)

Agaricus fissuratus (F.H. Møller) F.H. Møller
Friesia 4 (3): 204. 1952

Common Name: horse mushroom

Misapplied name: Agaricus arvensis Schaeffer

  • Pileus

    Cap 6-21 cm broad, convex, expanding to plano-convex; margin incurved, decurved at maturity; surface smooth to finely scaled, cracking in dry weather; disc yellowish-buff, shading to a cream-colored margin, bruising yellow slowly, especially when young; flesh white, unchanging or yellowing slightly, thick, firm, but soft in age; odor and taste of anise when fresh.

  • Lamellae

    Gills close, free, pale at first, then blackish brown at maturity.

  • Stipe

    Stipe 4-14 cm tall, 1-3.5 cm thick, equal to tapering to an enlarged base, stuffed; surface smooth at the apex, white to cream, sometimes with scattered scales below, occasionally yellowing slowly; veil membranous, upper surface smooth, lower surface, with cream to buff, cottony patches arranged in a gear-tooth pattern, forming a membranous, superior, skirt-like ring.

  • Spores

    Spores 6.5-9.0 X 4.5-6 µm, elliptical, smooth; spore print chocolate-brown.

  • Habitat

    In arcs and rings in grassy areas, e.g. playing fields, pastures; fruiting from late fall to early winter.

  • Edibility

    Edible Excellent, though not as meaty as Agaricus augustus or A. bitorquis .

  • Comments

    Agaricus fissuratus is characterized by a cream-colored cap, free blackish gills, sweet odor (best observed in young, fresh material), grassland habit, and tendency to discolor yellow slowly when bruised or in KOH. It is most likely to be confused with the more common Agaricus xanthodermus , but the latter has a whitish cap with a buff-brown disc, a phenolic odor, and bruises yellow quickly, especially along the cap margin and stipe base.

    According to Agaricus expert Rick Kerrigan, the correct name for what we have been calling A. arvensis is A. fissuratus and the correct name for what we have been calling A. osecanus is A. arvensis .

  • References

    Ammirati, J.F., Traquair, J.A. & Horgen, P.A. (1985). Poisonous Mushrooms of the Northern United States and Canada. University of Minnesota Press: Minneapolis, MN. 396 p.
    Breitenbach, J. & Kränzlin, F.
    (1995). Fungi of Switzerland. Volume 4: Agarics (2nd Part). Entolomataceae, Pluteaceae, Amanitaceae, Agaricaceae, Coprinaceae, Strophariaceae. Verlag Mykologia: Luzern, Switzerland. 368 p.
    Desjardin, D.E., Wood, M.G. & Stevens, F.A.
    (2015). California Mushrooms: The Comprehensive Identification Guide. Timber Press: Portland, OR. 560 p.
    Kerrigan, R.W.
    (1986). The Agaricales (Gilled Fungi) of California. 6. Agaricaceae. Mad River Press: Eureka, CA. 62 p.
    Kerrigan, R.W. (2016). Agaricus of North America. New York Botanical Garden: Bronx, NY. 574 p.
    Sánchez, L.A.P. (2013). Agaricus L.; Allopsalliota Nauta & Bas; Part 2. Edizioni Candusso: Alassio, Italy. 1168 p.

  • Other Descriptions and Photos Main Photo
    • Robert Rich: Agaricus arvensis (D & CP)
    • Pilze, Pilze, Pilze: Agaricus arvensis (CP)
    • Arora (1986): p. 332 (D & P)
    • Arora (1991): p. 104 (D & CP)
    • Jordan: p. 221 (D & CP)
    • Kerrigan: p. 18 (D & CP)
    • Lincoff: p. 501 (D), plate 156 (CP)
    • Miller: sp. 210 (D & CP)
    • Phillips: p. 166 (CP), p. 167 (D)
    • Smith & Weber: sp. 172 (D)

    (D=Description; I=Illustration; P=Photo; CP=Color Photo)

The Fungi of California
Copyright © 1996-2018 Michael Wood & Fred Stevens
A MykoWeb Page

Following modified from Taiwan Biodiversity National Information Network
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Kingdom Fungi  
 Phylum Basidiomycota  
 Class Basidiomycetes  
 Order Agaricales  
 Family Agaricaceae  
 Genus Agaricus  
  Agaricus arvensis    Scharff. & Fr. 
Provider: Chou, Wen-Neng 
hierarchy tree    download xml    download txt    Chinese Page    
Synonyms: Agaricus arvensis exquisitus Agaricus exquisitus Agaricus fissuratus Agaricus leucotrichus Agaricus nivescens parkensis Agaricus osecanus Agaricus parkensis Fungus arvensis Phaeomarasmius chiliotrichi Phaeomarasmius exquisitus Pratella arvensis details
Citation: Hou, H.H. & Wu, L. C.:中國園藝 17(1) :7, 1971
Name Code: 143076
  
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http://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Agaricus+arvensis&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Fungi ---> https://calphotos.berkeley.edu/cgi/img_query?query_src=dl&where-taxon=Agaricus+arvensis&where-lifeform=specimen_tag&rel-lifeform=ne&rel-taxon=begins+with&where-lifeform=Fungi

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Number of matches : 2
Query: SELECT * FROM img WHERE ready=1 and taxon like "Agaricus arvensis%" and (lifeform != "specimen_tag" OR lifeform != "Fungi") ORDER BY taxon

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Agaricus arvensis
Agaricus arvensis
Horse Mushroom
ID: 0000 0000 0304 0504 [detail]
© 2004 Rex Bartlett

Agaricus arvensis
Agaricus arvensis
Horse Mushroom
ID: 9187 3302 4603 0002 [detail]
Dr. Robert Thomas and Dorothy B. Orr
© 2001 California Academy of Sciences

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