Checklist of the British & Irish Basidiomycota

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Pholiota squarrosa (Weigel) P. Kumm., Führ. Pilzk. (Zwickau): 83 (1871)

Pholiota jahnii sensu Breitenbach & Kränzlin [B&K4: 334, pl. 428 (1995)]
Agaricus floccosus Schaeff., Fung. bavar. palat. nasc. (Ratisbonae) 4: 27 (1774)
Agaricus squarrosus Weigel, Herb. Fr. (Paris) 3: tab. 266 (1780)
Lepiota squarrosa (Weigel) Gray, Nat. Arr. Brit. Pl. (London) 1: 602 (1821)
Agaricus verruculosus Lasch, Linnaea 3: 408 (1828)
Dryophila squarrosa (Weigel) Quél., Enchir. fung. (Paris): 68 (1886)
Pholiota squarrosa var. verruculosa (Lasch) Sacc., Syll. fung. (Abellini) 5: 749 (1887)

Habitat: Parasitic, then saprotrophic. On wood of deciduous trees, often at the base of living trunks or on relatively fresh stumps, causing a white rot. Most often collected on Fagus and Fraxinus but also known on Betula and Buddleja spp., Gleditschia triacanthos, Liquidambar styraciflua, Malus, Platanus, Populus, Prunus and Salix spp., Sophora japonica, Sorbus aucuparia and Tilia spp. Rarely reported on conifers such as Abies, Pinus and Picea spp., but those hosts are not verified.

Notes: Common and widespread.

Distribution: E: c, S: c, W: c, NI: c, ROI: c, Other: Isle of Man: o

Vouchers: England: K(M) 31661; Scotland: K(M) 84273; NI: K(M) 84265; ROI: K(M) 84285; Other: Isle of Man: K(M) 84282

Descriptions, Lists & Icons:
D+I:, in Breitenbach, J., Kränzlin, F., Fungi of Switzerland Agarics, 2nd part: Entolomataceae, Pluteaceae, Amanitaceae, Agaricaceae, Coprinaceae, Bolbitiaceae 4: 368 pp. (1995), p. 342, pl. 440
D+I:, in Phillips, R., Mushrooms and other fungi of Great Britain & Europe: 288 pp. (1981), p. 145
I:, in Lange, J.E., Flora Agaricina Danica 1: 92 pp. (1935), pl. 110 D
D+I:, in Courtecuisse. R. & Duhem. B., Mushrooms and Toadstools of Britain & Europe: 480 pp. (1995), p. 350
D:, in anon., Flora Agaricina Neerlandica 4: Critical Monographs of Families of Agarics and Boleti occuring in the Netherlands Strophariaceae, Tricholomataceae (3), (Ed.: C.Bas, Th.W. Kuyper, M.E. Noordeloos & E.C. Vellinga) 4: 191 pp. (1999), p. 83

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