This is another pic of the steroidal, it does not sucker as much as my regular one.
Rice-Paper Tree (Tetrapanax papyriferus)
Is it planted in Full Sun in the middle of your yard?
Im in Zone 7 and plan on purchasing one, Was not sure to plant it in a bed or as a specimen like yours. It looks nice like that.
I have had it next to the house and also in the middle of the yard. I now live in a different zone and do not grow it anymore. I remember that it suckered and one of the reasons that I planted it in the middle of the yard was so I could mow down any plants that I didn't want. I did love this plant and miss it.
It grew in partial shade as well as full sun also.