Did it open this way? The dorsal sepal covers the entire top portion of the bud and this may have been damaged prior to opening. Other suspects would be a slug or a curious cat if it occurred after opening.
Last edited by Cym Ladye; 07-30-2014 at 03:35 PM..
Cut worms cause this type of damage. Small inch type worms can hide right in plain sight. Look closely along the stems of the plant. They blend in very well.