Joyce that looks just like a ditch in Thailand, glorious. They grow like wild-fire there filling up every ditch, just like yours. Flowers as big as your head. Do you eat the tubers? They're delicious, taste just like a yam, and look very pretty sliced through. You should try, excellent in stews for a slow cook or for a bit of crunch in salads, like water chestnut, just cook first in boiling water then let cool and eat tossed in lettuce and stuff.