Dear Judy, A number of years ago I worked in a zoo that kept Colobus leaf monkeys. In the basement of the monkey house we had big troughs up on tables with overhead lights. We planted regular store bought sweet potatoes and grew them for the leaves which were harvested as a special treat for the monkeys. At least one of the ornamental sweet potatoes ,although I can't recall which one off hand, is the same cv (under a different name), from a commercial variety grown for tubers. The 'New Oxford Book of Food Plants" says that the tender above ground parts of sweet potatoes is routinely eaten as a vegetable in Asia. And finally, as has been mentioned, the water spinach aka Ipomaea aquatica is a morning glory which is a sweet potato in that all belong to the same genus. I am not suggesting that all parts of all species in the genus are edible, but I think all commercial tuber types have edible greens when young and tender. and "I think" this applies as well to 'Blackie', 'Margaritia', and other ornamental types which all produce edible tubers. Give us your taste test results and recipes Thanks Jim W. -- Dr. James W. Waddick 8871 NW Brostrom Rd. Kansas City Missouri 64152-2711 USA Ph. 816-746-1949 Zone 5 Record low -23F Summer 100F +