Have you tried eating it?
It looks a little like something we used to grow in Florida, we called it "Thai Spinach", but I am sure that name was wrong, just made up by the guy who gave it to us. We got it from a local guy and managed to keep it going for years, never saw it for sale or in anyone else's garden. I liked it because it was the only green that thrived in our long hot humid summers, growth slowed in winter but it survived and became a perirenal in the garden. The give away was color when cooked. Boiling turned it purple, particularly the water. I liked it, tasted good cooked and not bad in a salad.
Hope you like it, whatever it is.