Checklist of the British & Irish Basidiomycota

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Rhodocollybia butyracea (Bull.) Lennox, Mycotaxon 9: 218 (1979)

Agaricus butyraceus Bull., Herb. Fr. (Paris) 12: tab. 572 (1792)
Agaricus leiopus Pers., Tent. disp. meth. Fung.: 21 (1797)
Agaricus butyraceus γ asemus Fr., Observ. mycol. (Leipzig) 2: 124 (1818)
Agaricus asemus (Fr.) Fr., Syst. mycol. (Lundae) 1: 121 (1821)
Collybia butyracea (Bull.) P. Kumm., Führ. Pilzk. (Zwickau): 117 (1871) var. butyracea
Collybia butyracea (Bull.) P. Kumm., Führ. Pilzk. (Zwickau): 117 (1871)
Collybia asema (Fr.) Gillet, Hyménomycètes (Alençon): 317 (1876) [1878]
Agaricus bibulosus Massee, Grevillea 20(no. 95): 95 (1892)
Collybia bibulosa (Massee) Massee, Brit. Fung.-Fl. (London) 3: 125 (1893)
Collybia butyracea var. bibulosa (Massee) Rea, Brit. basidiomyc. (Cambridge): 331 (1922)
Collybia butyracea f. asema (Fr.) Singer, Lilloa 22: 201 (1951) [1949]
Collybia butyracea var. asema (Fr.) Quél., Enzyklopädie der Pilze Band 2: Schnecklinge, Trichterlinge, Ritterlinge, Rötlinge, Wulstlinge u.a. (München): 427 (1987)
Rhodocollybia butyracea f. asema (Fr.) Antonín, Halling & Noordel., Mycotaxon 63: 365 (1997)

Habitat: Saprotrophic, on soil amongst litter under coniferous, and less often deciduous, trees.

Notes: Frequent and widespread, but apparently less so than the var. asema..

Distribution: E: c, S: c, W: c, NI: c, ROI: c, Other: Channel Islands: ! Isle of Man: !

Vouchers: England: K(M) 117253; Scotland: K(M) 86598; NI: K(M) 82872


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