Collection location: Santa Rosa, Sonoma Co., California, USA [Click for map]
Found poking out of the edge of a lawn, near Betula populifolia (Gray birch).
Pileus: moist, center sunken, margin slightly inrolled. 7.5 cm across.
Gills: pale tan, at first, bruising dark reddish brown and, finally, turning warm brown. Decurrent, turning vein-like on stipe, some forking.
Stipe: curved, wider at apex, appears to have darkened where touched. 11mm wide at apex.
7 cm total height.
Spores: cinnamon brown.