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Original image at http://www.ispotnature.org/node/693350http://www.ispotnature.org/node/693350” class=”bbcode_url”> That’s too big for upload here, so I have reduced the image quality.
Growing on large hardwood log (Oak most likely) in mixed Oak/Ash/Maple/Wild Service woodland on clay. Distinct mushroom odour. Possibly Pleurotus?
Welcome to the forum. Looks good for Pleurotus ostreatus! By the way, reducing the image dimensions from 3,578px × 2,385px down to something more like 1600 x 1200 (full screen on my 23″ monitor) would be the recommended way. Image quality can be set to medium/web depending on your software. 400k is the size limit
Agree with Adam – likely to be P.ostreatus with gills slightly decurrent. P.cornucpiae is similar but with much more decurrent gills. Not sure but I think spores of these 2 are very similar. Mark
This is Pleurotus cornucopiae: the stipe is more central than in ostreatusand, the top left image especially, shows ‘gill ridges’ extending to the base of the stipe. Hi Mark, FAN2 keys out
cornucopiaeas having deeply decurrent gills “… passing into anastomosing ridges on stipe…” and gives a slightly different spores size. The other species have gills “… subdecurrent, not or hardly anastomosing…”. Stipes for
cornuopiaeare described as 30-110mm long, “…subcentral to excentric” and for ostreatus, “…absent or short … eccentric to lateral…”. Totally agree with Roy – classic P. cornucopiae; it’s hard to see how those gills could be more decurrent . . . . Good photographs by the way – showing all the necessary macro-characters and the habitat. Chris
I’d ruled out cornucopiae due to the lack of branching and sharing of a common stem but these guys know their stuff 
Another thought from ‘elsewhere’ – P. pulmonarius. I think not native but may have come into UK as spawn of ‘Oyster Mushroom’. Any thoughts?
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