AMOENUM GROUP - Leaf lobes
shallowly to moderately divided up to two-thirds of the way to the leaf base.
PALMATUM GROUP - Leaf lobes
moderately to deeply divided, two-thirds to three-quarters of the way to the leaf base.
MATSUMURAE GROUP - Leaf lobes
very deeply divided, more than three-quarters of the way to the leaf base.
DWARF GROUP - Cultivars
whose mature height does not usually exceed 6'
LINEARILOBUM GROUP - Leaf
lobes narrow, strap-like, divided to the leaf base.