Growing on the outer bank of a ditch. On very dry, sandy soil in Breckland
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I've never seen it, but I'm sure you're right from the descriptions in the books.
I knew it was present at this site and has always been one of those mystical plants I've always wanted to see so finally seeing it was really nice!
Please see my Flickr photo's www.flickr.com/photos/129804972@N07/
Lat/Lng: 52.5161, 0.6122
OS grid ref: TL773941