Collection location: Larch Mountain, Multnomah Co., Oregon, USA [Click for map]
Keyed to R. sororia in Aurora’s Mushrooms Demystified. I suspect, but cannot prove, this may be R. granulata or R. pulverulenta, both of which are described as having “scurfy-granulose” caps. I have been unable to define scurfy, and there is no definition at the back of MD. However, the cap does appear to have fine grayish-brown fibrils or hairs, very unlike any other Russula I’ve seen. This specimen was first seen nearly hypogeous, with all but the top of the cap under a thick layer of humus. The cap was perhaps 1/2 inch higher than the surrounding humus layer, and it may have been arising from buried wood, which is very common in this area. Both the gills and stipe are exuding water, which must be produced by the expansion of the cap, since these areas were completely sheilded by both the cap and a thick humus layer from direct rainfall. I cannot see any striations on the edge of the cap at all, but this appears to be a very young specimen.
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