Konjac, amorphophallus, Stanley s water-tub, jelly

Amorphophallus konjac

Konjac Sponge

Synonymes :
Devil's Tongue, Glucomannan
Konjac (Wikipedia)

Amorphophallus konjac
Amorphophallus konjac CBM.png
Scientific classification edit
A. konjac
Binomial name
Amorphophallus konjac
  • Amorphophallus mairei H.Lév.
  • Amorphophallus nanus H.Li & C.L.Long
  • Amorphophallus rivierei Durand ex Carrière
  • Brachyspatha konjac (K.Koch) K.Koch
  • Conophallus konjak Schott
  • Hydrosme rivierei (Durand ex Carrière) Engl.
  • Proteinophallus rivierei (Durand ex Carrière) Hook.f.
  • Tapeinophallus rivierei (Durand ex Carrière) Baill.

Konjac (or konjak, English: /ˈkɒnjæk, ˈkɒnæk/ KON-yak, KON-jak) is a common name of the East and Southeast Asian plant Amorphophallus konjac (syn. A. rivieri), which has an edible corm (bulbo-tuber). It is also known as konjaku, konnyaku potato, devil's tongue, voodoo lily, snake palm, or elephant yam (though this name is also used for A. paeoniifolius).

It is native to Yunnan in China and cultivated in warm subtropical to tropical East and Southeast Asia, from China and Japan south to Indonesia (USDA hardiness zone 6-11). It is a perennial plant, growing from a large corm up to 25 cm (10 in) in diameter. The single leaf is up to 1.3 m (4 ft) across, bipinnate, and divided into numerous leaflets. The flowers are produced on a spathe enclosed by a dark purple spadix up to 55 cm (22 in) long.

The food made from the corm of this plant is widely known in English by its Japanese name, konnyaku (yam cake), being cooked and consumed primarily in Japan and Korea. The two basic types of cake are white and black. Noodles made from konnyaku are called shirataki. The corm of the konjac is often colloquially referred to as a yam, though it is not related to tubers of the family Dioscoreaceae.

Konjac (Wiktionary)


Alternative forms

  • konjak
  • konjaku
  • konnyaku


From an Asian language; compare Japanese 蒟蒻, 菎蒻 (konnyaku), Korean 곤약 (gonyak). This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term.


  • IPA(key): /ˈkoʊn.jæk/
  • Homophone: cognac


konjac (usually uncountable, plural konjacs)

  1. A foul-smelling plant grown in Asia, Amorphophallus konjac.
  2. A (range of) food product(s) made from the plant, including a
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