There was a guy across town that had about 2 acres of that bamboo (mandrake) in his back yard. He died, someone else bought the property and tried to give away all the bamboo to get rid of it. He put an ad on Craig's list that I saw 6 months after the fact. I called to see if it was the patch I had been cutting from for years, it was but had been bulldozed. The new owner said I could salvage anything out of the bush piles I wanted, I found the trunks in the picture and brought them home.
The sad thing is there was 8" bamboo in the patch that was ruined before I could get to it, just splintered trunks left after the bulldozer.