On mossy ground under balsam fir in mixed woods. Cleft (star) bulb, brown staining. Measurements of largest button: 1) flesh thickness above stipe: 10 mm., 2) length of stem from top of bulb to bottom of cap flesh: 130 mm.,3) Length of bulb: 25 mm., 4) Stem width mid-height: 13 mm., 5) Width of bulb at widest point: 38 mm. Compare this A. brunescens to the smaller and paler variation in MO 140939.