1) I have seen some specimen with pink to peach (not orange) colour that I dont recall that I have ever seen before. Check the photos to compare with the normal scarlet/orange colour
2) More interesting, in close proximity there where other specimen which had a very large flower size compared to normal. I cut a sample to scan, but when I arrived it was alread closed down. However I could measure it and the flower was 13mm across.
Haslam records of the corolla are (2), 4-7, (10)mm 'long'


Could it be some A. arvensis sub-species or just a giant variety?