Name requested: Agaricus butyraceus

	Mycotaxon 9 (1): 219. 81: 127.
	Persoonia 2 (1): 31.

Homotypic synonym: Collybia butyracea

	Annales Mycologici 12 (4): 434.
	Mycologia 9 (3): 164. 38 (3): 260. 52 (5): 815. 56 (4): 614, 622. 59 (2): 379. 59 (5): 915. 65 (6): 1322, 1326. 67 (6): 1209. 75 (4): 707. 81 (6): 870.
	Mycology and Phytopathology [as Микология и Фитопатология] 1 (2): 152, 155, 156, 157. 2 (2): 107. 5 (1): 30. 6 (2): 115. 6 (4): 310. 7 (3): 201. 10 (4): 318.
	Mycotaxon 9 (1): 122, 219. 14 (1): 305, 306, 307. 23: 226. 44 (2): 391, 392, 393, 399, 400, 407. 60: 218. 72: 222. 81: 127. 82: 184, 201. 84: 148.
	Sydowia 6 (1-4): 187. 26 (1-6): 98. 43: 198.

Homotypic synonym: Rhodocollybia butyracea

	Mycotaxon 9 (1): 218, 219}, 220, 221, 222. 63: 366. 81: 127.
	Persoonia 18 (2): 165.