Thank you for the identification advice, it is very helpful. While these plants were in a similar area they were separated by some meters. Should I separate them into two separate records? DerekC
I don't think you need to separate them. I think both plants are C. cornuta and, from the location, the first one might even be the same plant as my sighting from 7 April - see timeline. The stem just isn't very clear in this photo. It's always worth checking the position of the leaf tip and trying to include it in the photos, especially when the flowers have closed.
I agree images 2 and 3 look like it is your 7 April/21 March records. My first image was possibly taller but had been bent right over and was vertical at surrounding grass height. My other images were vertical but taken with camera rotated 90 deg. it is a new Olympus TG-4 compact and while the uploaded images are correctly rotated on my laptop CNM is not rotating them. I am sure it will be a setting I am yet to find on the camera but until then it does not show the difference between these separate images.