Northeastern Asian Flora
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Amorphophallus konjac K.Koch   (redirected from: Proteinophallus rivieri (Durand ex Carri?e) Hook.f.)
Family: Araceae
[Amorphophallus mairei H.L?., moreAmorphophallus nanus H.Li & C.L.Long, Amorphophallus palmiformis Durand ex Carri?e, Amorphophallus rivieri Durand ex Carri?e, Amorphophallus rivieri var. konjac (K.Koch) Engl., Brachyspatha konjac (K.Koch) K.Koch, Conophallus konjak Schott, Conophallus konniaku Schott ex Fesca, Hydrosme rivieri (Durand ex Carri?e) Engl., Proteinophallus rivieri (Durand ex Carri?e) Hook.f., Tapeinophallus rivieri (Durand ex Carri?e) Baill.]
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Japan Flora: Tuber large, depressed-globose, to 25 cm. across; leaf solitary, arising from the center of the tuber, more than 1 m. 切11,the petiole long, spotted with purple, the blade ternate, the primary leaflets again binate or ternate or 2- or 3- parted, the ultimate leaflets or segments pinnately parted on a winged axis, the lobes ovate to narrowly so, caudate-acuminate, 4-8 cm. long, entire, glabrous; scape arising from the center of the tuber, about 1 m. long, with several scales at base; inflores­cence 30-50 cm. long; spathe broadly ovate, tubular-infundi- buliform, with dark purple variegations, glabrous outside, with small protuberances at base inside; spadix with the pistil­late flowers below and continuous with the upper staminate flowers, the appendage erect, much longer than the fertile part, long-exserted from the spathe, dark purple, obtuse; berries yellowish red when mature.  May.

Native of Indochina, widely cultivated in our area for “Konnyaku” or mannan from the tubers.

Amorphophallus konjac
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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