Amorphophallus rivieri wani nau'in tsiro ne da aka fi sani da "harshen shaidan" ko "konjac." Yana cikin dangin Araceae kuma asalinsa ne a kudu maso gabashin Asiya. Kalmar “amorphophallus” ta samo asali ne daga kalmomin Helenanci “amorphos,” ma’ana “marasa siffa,” da “phallos,” ma’ana “azzakari,” dangane da sifar tsarin halittar shuka.
