Collector’s_Name: Alden Dirks
Substrate: Ground
Habitat: Burr oak and white pine savanna
Host: Unknown
Other: Cap: 8.5 cm diameter, dry, shiny, smooth, but cellophane-like in texture, white to brown
Gills: white to tannish, close
Stipe: skirt-like ring, sticking to stem; stipe straight to club-shaped, narrower at apex, 1 cm, broader at base, 1.5 cm, with a basal bulb about 2.5 cm wide, with little to no remnants of universal veil
General: this collection consists of multiple specimens a few dozen feet away from each other, thought to be the same species

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The species with the stain near the stem base above the bulb illustrates A. brunnescens.
By: R. E. Tulloss (ret)
2018-08-13 15:43:12 PDT (-0700)

The cap is citrin with a brown gray stain on it. The bulb has a number of vertical clefts in it and is abrupt or subabrupt.

Very best,