Northeastern Asian Flora
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Arisaema iyoanum Makino   (redirected from: Arisaema akiense var. nakaianum Kitag. & Ohba)
Family: Araceae
[Arisaema akiense Nakai, moreArisaema akiense var. nakaianum Kitag. & Ohba, Arisaema iyoanum subsp. nakaianum (Kitag. & Ohba) H.Ohashi & J.Murata, Arisaema iyoanum var. nakaianum (Kitag. & Ohba) Kitag. & Ohba, Arisaema iyoanum var. viridescens Makino, Arisaema nakaianum (Kitag. & Ohba) M.Hotta]
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  • Japan Flora
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Japan Flora: Tuber depressed-globose, bearing a few small additional tubers; leaf solitary, long-petioled; leaflets 9-11, lanceolate, long-acumi­nate, cuneate at base; spathe light green to purplish, the blade 4-9 cm. long, linear-ovate, gradually acuminate, broadened at base, the upper margin of the tubular part recurved; spadix­appendage narrowly cylindric, rounded at apex, somewhat thickened and truncate at base.  

Tuber depressed-globose, covered with the fibrous remains of old sheaths, scalelike leaves 4, the outer 2 whitish, the others light brown or greenish; normal leaf solitary, the petiole terete, about 25 cm. long including the sheath; leaflets 7, rather loosely pedate, lanceolate-oblong, 6-13 cm. long, 2-3.5 cm. wide, acuminate, acute at base, undulate on margin; peduncle shorter than the leaf; spathe large, the tube to 4 cm. long, about 10 mm. across, with longitudinal whitish purplish stripes above the middle, the mouth ampliate, the blade longer than the tube, oblong-lanceolate, subabruptly acute, purple­brown, bent down and arching over the spadix, recurved on margin; spadix-appendage cylindric-clavate, whitish but pur­plish at base.  May.

Honshu (Aki Prov.), Shikoku (Omogokei in Iyo Prov.)

Arisaema iyoanum
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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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