Agrocybe paludosa

Credit: James Lindsey

Synonyms

Pholiota paludosa (J.E. Lange) S. Lundell, in Lundell & Nannfeldt
  Fungi Exsiccati Suecici 49-50(Sched.): 41 (1957)
Pholiota praecox var. paludosa J.E. Lange
  Dansk bot. Ark. 2(11): 7 (1921)

Common names

Pholiote des marais (French)
Sumpf-Ackerling (German)

Description

Cap: 1.5-4 cm diameter, convex, becoming expanded sometimes with broad umbo; color pallid tawny with greyish tinge, hygrophanous, drying cream; smooth, greasy when moist, wrinkled when dry; flesh pallid, firm and thin.
Gills: adnate or adnexed, close, initially pale brown, becoming dirty brown at maturity.

Agrocybe paludosa gills
Credit: James Lindsey, as above.

Stem: 5-9 cm tall x 2-3 mm thick, whitish, smooth, silky, more or less equal, ring whitish, membranous, ascendant, sub-apical; flesh whitish, firm and hollow.
Spores: smooth, ovoid to ellipsoid, large germ pore, 8-11 x 5-7 µm.
Spore print: brown.
Odor: farinaceous.
Taste: not distinctive.
Edibility: inedible.
Habitat: on ground, often in groups or rings, in marshy fields and other locations subject to periodic flooding; late spring to summer; infrequent.

Description adapted from Jordan (2004), pg. 245.

Research by Flynn and Miller (1990) suggest that this species is part of a ‘species complex’ of Agrocybe praecox. This complex contains 5 taxa that are not easily distinguished morphologically, but may be recognized and identified by considering ecological characteristics such as habitat, substrate and geographical origin.

Medicinal properties

Antitumor effects

Polysaccharides extracted from the mycelial culture of A. paludosa and administered intraperitoneally into white mice at a dosage of 300 mg/kg inhibited the growth of Sarcoma 180 and Ehrlich solid cancers by 90% and 100%, respectively (Ohtsuka et al., 1973).

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References

Flynn T, Miller OK.
Biosystematics of Agrocybe molesta and sibling species allied to Agrocybe praecox in North America and Europe.
Mycol Res. 1990 94(8):1103-10.

Jordan M. (2004).
The Encyclopedia of Fungi of Britain and Europe.
Frances Lincoln Ltd. 384 pp.

Ohtsuka S, Ueno S, Yoshikumi C, Hirose F, Ohmura Y, Wada T, Fujii T, Takahashi E.
Polysaccharides having an anticarcinogenic effect and a method of producing them from species of Basidiomycetes.
UK Patent 1331513, 26 September 1973.

Watling R.
Bolbitiaceae: Agrocybe, Bolbitius & Conocybe.
Br. Fungus Flora, Agarics Boleti. 1982 3:1-139.

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