xylaria said:Pleurotus dryinus, very nice picture, and a very nice tasty mushroom. It should be about the size of your hand, and the spore print is WHITE. If you are going to pick it take care not disturb the myclium [fungi roots] as this will give future crops. I have never found harvesting just the fruit body has much effect on whether it grows there next year, with this particular group, and this fungus is common. I AM NOT A SUBSTITUTE FOR A GOOD FIELD GUIDE, but this fungus doesn't look like any else.
The garden has recently set aside part of the woodland as a Cryptogamic Sanctuary & Reserve. The Reserve is in an old Beech plantation and it offers a unique chance to view fungi, lichens, ferns, horsetails, mosses and liverworts. It will allow the study of these lower plants and the effect they have on a habitat, particularly the way fungi recycle nutriants back into the soil. It is hoped that as the sanctuary develops new species will colonise the area.