I don't think a petal is missing on the top, but the petals are just separated a little
Canon 7DII + 180/3.5 + tripod
f/11, 1/24, ISO 800
ACR for RAw conversion, PSCC
Image rotated counterclockwise by 90 degrees, cropped for composition.
I suspect it id really easy for me to say, " was this the best sample"? It is sharp colours ok but I am not too sure about the structure bottom left - does it help or add to the composition? I find the gap where there may (or may not!) be a missing peta a little disconcerting.
Love the dew with the really small drops and the really big drops. The blue and green go great together. It's hard to make nice images of these flowers. They grow in tight clusters.