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)
Pholiote des marais (French)
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.
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.
Taste: not distinctive.
Habitat: on ground, often in groups or rings, in marshy fields and other locations subject to periodic flooding; late spring to summer; infrequent.
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.
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).
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.