Tales leaf (mbote, taro) after rain.
Bulb at base of stem (corm) can be steamed/boiled/roasted/fried. Can eat leaves and stem but must be processed (soaked in cold water or cooked enough) to remove toxins. Easy to forage, popular ornamental in Bali/Java and elsewhere (‘elephant ear’).
(Reposting a few photos so they appear on my photos page.)