On the left, Ahipa (Pachyrhizus ahipa; Andean yam bean) and Jicama (P. erosus, Yam bean) in my office; September 2016… I hadn’t realised that Ahipa doesn’t climb, hence the stakes on both plants…the yellow things are models of my company, OCEANOR’s marine environmental monitoring buoys that I tested in a wave tank back in the 80s!