I see that you photographed this dahlia at Dahlia Hill. I, too, photograph the collection at that location. This plant was mislabeled as 'Ferncliff Illusion' early in the 2019 season, but has since been relabeled by the staff 'Ferncliff Lemon Aura'. This comment is just to let you know I'm the one who proposed moving this photo to that plant. If you look at the entry in garden.org for Ferncliff Lemon Aura, I think you'll agree it's a better match for your photo than 'Ferncliff Illusion'. - Regards, Elizabeth (arctangent), 10/9/19