[Wikipedia] Food Source: The species, rarely used by indigenous people as a leaf vegetable, was first documented by Captain Cook. It was immediately picked, cooked, and pickled to help fight scurvy, and taken with the crew of the Endeavour.[8] It spread when the explorer and botanist Joseph Banks took seeds back to Kew Gardens during the latter half of the 18th century.[14] (link added by Mary Ann Machi)