That 'saw-tooth' trait comes from the Eric Young 'Rocket Fire', which is also known to be labeled as 'Mont Millais' as well. It's a 4N which Chuck has used extensively in phrag breeding. It's a great breeder for size, but unfortunately it often passes on the jagged edges. However, sometimes hybrids made with it will switch back and forth from regular smooth edged petals to the jagged edged petals. What breeders need is a new 4N Eric Young without that trait (some are coming along in the lab now hopefully).
Just a little breeding info I thought people may find interesting.