Northeastern Asian Flora
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Arisaema japonicum Blume   (redirected from: Arisaema serratum f. japonicum (Blume) Makino)
Family: Araceae
[Amidena japonica (Blume) Raf., moreArisaema koshikiense Nakai, Arisaema pseudojaponicum Nakai, Arisaema pseudojaponicum f. serratifolium Nakai, Arisaema serratum f. blumei Makino, Arisaema serratum f. japonicum (Blume) Makino, Arisaema serratum var. blumei (Makino) Engl., Arisaema takesimense Nakai, Arisaema yakushimense Nakai]
Arisaema japonicum image
  • Japan Flora
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Japan Flora: Tuber depressed-globose, about 4 cm. across; pseudostem 2(M0 cm. long; leaves 2, the lower one larger, 11> to 13-foliolate, with an erect spreading petiole about 10 cm. long, the upper one smaller, with a petiole about 5 cm. long, 5- to 9-foJiolate; leaflets narrowly oblong or narrowly lanceo­late, entire; peduncle 15-17 cm. long, longer than the leaves; spathe-tube 6-6.5 cm. long, 1-1.5 cm. in diameter, purplish, with longitudinal pale stripes, the spathe blade broadly ovate or deltoid-ovate, acuminate, declined over the spadix, purple to dark purple with longitudinal white stripes, 3-5 cm. wide; spadix-appendage narrowly cylindric. Mar. 

Tuber depressed-globose, with few lateral tubers; pseu­dostem 30-50 cm. long; leaves 2, the lower one larger, the petiole nearly erect, 10-25 cm. long; terminal leaflet oblong to broadly lanceolate, 10-30 cm. long, 3-8 cm. wide, abruptly acuminate; peduncle 10-30 cm. long; spathe with the upper margin of the tube narrow, recurved, the blade narrowly ovate or oblong, 6-9 cm. long, obliquely bent downward, straight, long-acuminate, dark purple (forma japonicum) or green (forma viridans T. Koyama), longitudinally white-striped; spadix-appendage cylindric, 1-3 (-5) mm. in diameter, not thickened above, smooth, slightly thickened and truncate at base.  Apr.-May.

Honshu (Echizen, Mino, Omi Prov. and westw.), Shikoku, Kyushu.

var. brachyspatha T.Koyama.  Spathe­blade considerably shorter, bent forward horizontally, abruptly narrowed at apex, short-acuminate, otherwise with the charac­ters of the typical phase. Honshu (Suruga, Mikawa, Owari Prov. and elsewhere).

var. akitense Nakai Leaflets larger, oval to obovate-oval, to 10 cm. wide, otherwise with the characters of the typical phase. Honshu (Ugo Prov.);

 

Arisaema japonicum
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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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