zirconium

I learned 'goosegrass, or cleavers' from, I believe, a Brother Cadfael novel, long before I encountered it in the green! I'm not sure I'd want to eat it, though. My younger sister and I laboured for a long time occasionally, when I was down in Swansea, trying to remove as much as possible from Mum's garden; we called it 'stickygrass' for concise reference.