When: 2007-06-29
Collection location: Grass Lawn Park, Redmond, King Co., Washington, USA [Click for map]
Notes:
growing clustered under maple
pileus: diam: 120 mm wide and 45 mm high in mature specimens, 30 mm wide and 13 mm high in buttons; exterior reddening after rubbing
trama: 10 mm thick in mature specimens, 7 mm thick in buttons; slightly bitter taste; interior staining yellow after cutting
lamellae: 50 mm long and 9 mm high in mature specimens, 16 mm long and 3 mm high in buttons; pinkish gills, darkening with age
stipe: 50 mm long, 11 mm wide at apex, 15 mm wide at base in buttons, slightly bulbous-clavate; 75 mm long, 22 mm wide at apex, 24 mm wide at base in mature specimens, curved towards base, slightly bulbous base; in general the stipe is irregularly shaped
[admin – Sat Aug 14 02:00:49 +0000 2010]: Changed location name from ‘Grasslawn Park, King County, WA’ to ‘Grasslawn Park, King Co., Washington, USA’
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In Agaricus the staining reaction and the odor are key features. The very common section Xanthodermati, stain yellow and then turn brown which can sometimes be reddish. The unpleasant taste/odor would be consistent with that group. I don’t know of any Agaricus species that have a red staining pileus and yellow staining flesh.
Created: 2007-06-29 15:02:55 PDT (-0700)
Last modified: 2011-04-05 12:39:29 PDT (-0700)
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It seems to flash yellow, and then slowly turn brown/red. As Arora puts it, “fleetingly lutescent.”