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How large are the flowers? Any picture of the stipules?
Once again I am caught out by my early enthusiasm when I thought a flower was a flower (2008)! Unfortunately I have no record of the size and no photos other than the flowerhead. It seems to be on very short stems and would 16th May be early for lutea?
I saw lutea in flower two weeks ago. Indeed I expect it is too early for tricolor.
Fine, it seems we have agreement and I shall amend the o.b. accordingly.
Lat/Lng: 54.6099, -3.1096
OS grid ref: NY284244