I think it's likely that what you are seeing as a serrate or lobed leaf on Augustus'
head is actually a small cluster of bay leaves.
Some laurels have leaves six inches long. Laurus nobilis, the sweet bay or bay laurel, was sacred to
Apollo, and its leaves are much smaller than that, maybe two or three inches long, and they are smooth-edged, neither serrate
nor lobed. The actual size will depend on its environment and the method of cultivation. Those shown in this
wreath look unusually small even for bay, but on the other hand they look as though they might be young, immature shoots, which would appear especially fresh and green.
Bill