You could check edible plant books for common plants that are high in sugar. Some are obvious, for example berries or perhaps starchy roots like cattail. Others might be surprising, such as wild onions, which like all onions have more sugar than you would expect from the taste. I'd be interested in what you find out!

Steve
_________________________
"After I had solaced my mind with the comfortable part of my condition, I
began to look round me, to see what kind of place I was in, and what was
next to be done"