Children (15 direct children, 21 direct and indirect children):
Physocarpus opulifolius
(tree size 3)
Common ninebark
Physocarpus capitatus
Pacific ninebark
Mallow ninebark
Mallow-leaf ninebark
Physocarpus monogynus
Mountain ninebark
Physocarpus amurensis
Physocarpus alternans
(tree size 3)
Dwarf ninebark
Physocarpus australis
Physocarpus pauciflorus
Physocarpus stellatus
Physocarpus torreyi
Physocarpus ribesifolius
Physocarpus bracteatus
Physocarpus intermedius
Physocarpus glabratus
Physocarpus hanceanus