Konjac (Japanese: 蒟蒻; konnyaku; literally "devil taro"), also known as konjak, konjaku, devil's tongue, voodoo lily, snake palm, or elephant yam (although this name is also used for A. paeoniifolius), is a plant in the genus Amorphophallus native to warm temperate to tropical eastern Asia from Japan and China south to Indonesia.
It is a perennial plant, growing from a large corm up to 25 cm diameter. The single leaf is up to 1.3 m across, bipinnate, divided into numerous leaflets. The flowers are produced on a spathe enclosed by a dark purple spadix up to 55 cm long.
These leaves are cut into noodle-like strips and used in Japanese Cuisine.
Konjac can also be made into a popular Asian fruit jelly snack, known variously in the United States as lychee cups (after a typical flavor and Nata de coco cube suspended in the gel) or konjac candy, usually served in bite-sized plastic cups.