Name requested: Gomphidius nigricans

Mycologia 4 (6): 306. 14 (3): 121, 123. 16 (1): 45. 17 (3): 114, 116, 118, 124. 25 (5): 380. 41 (4): 478, 480, 488. 63 (6): 1135, 1137, 1147, 1149, 1153.