The more common name but my plant ID also says "Giant wakerobin, a species of Birthroots! All weird names to me. This plant disappears in winter but comes up strongly every spring.
I am so sorry, just realized that you had such a bad injury, I hope that you are feeling better now. having read the book "Empire of Pain", opioid sounds very scary. Take care.
We are just watching a TV programme about NZ with a guy called Jimmy Doherty. He was in Invercargill at the Bert Munro place. A chap called Craig took him out to the beach & he rode a motorbike. I was half expecting John to appear as he talked about Bert Monro a lot.