Please can someone tell me what is this orange "rust" that appears often on ash or birch or chestnut trees?
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Thanks, Chris. I wonder if it is harmful to trees.
I don't think it is.
Chris Brooks - www.dragonfly-images.co.uk
My Flickr site - www.flickr.com/photos/ceb1298
To "Plants" from "Other" may attract more interest, now it's known to be such.
Lat/Lng: 51.2169, -0.717
OS grid ref: SU897471