Northeastern Asian Flora
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Arisaema serratum (Thunb.) Schott   (redirected from: Arisaema japonicum var. caespitosum Nakai)
Family: Araceae
[Arisaema amplissimum Blume, moreArisaema amurense var. peninsulae Nakai, Arisaema angustatum f. integrum Nakai, Arisaema angustatum var. peninsulae (Nakai) Nakai ex Miyabe & Kud, Arisaema angustifoliatum (Miq.) Nakai, Arisaema angustifoliatum var. holophyllum Nakai, Arisaema angustifoliatum var. integrifolium Nakai, Arisaema angustifoliatum var. serratifolium Nakai, Arisaema boreale Nakai, Arisaema capitellatum Nakai, Arisaema convolutum Nakai, Arisaema galeiforme Seriz., Arisaema hakonecola Nakai, Arisaema hatizyoense Nakai, Arisaema japonicum var. angustifoliatum (Engl.) Kitam., Arisaema japonicum var. atropurpureum (Nakai) Kitag., Arisaema japonicum var. caespitosum Nakai, Arisaema japonicum var. latisectum (Blume) Miq., Arisaema japonicum var. serratum (Thunb.) Engl., Arisaema koidzumianum Kitam., Arisaema latisectum Blume, Arisaema longilaminum Nakai, Arisaema niveum Nakai, Arisaema niveum var. viridescens Nakai, Arisaema peninsulae Nakai, Arisaema peninsulae f. alba Vasak & E.M.Egorova, Arisaema peninsulae f. atropurpureum (Nakai) Y.C.Chu & D.C.Wu, Arisaema peninsulae f. convolutum (Nakai) Y.S.Kim & S.C.Ko, Arisaema peninsulae f. variegatum Nakai, Arisaema peninsulae var. atropurpureum Nakai, Arisaema peninsulae var. attenuatum Nakai ex F.Maek., Arisaema peninsulae var. caespitosum Nakai, Arisaema peninsulae var. polyschistum T.K.Zheng & X.S.Wan, Arisaema planilaminum J.Murata, Arisaema proliferum Nakai, Arisaema serratum f. integrum Nakai, Arisaema serratum f. ionochlamys (Nakai) T.Koyama, Arisaema serratum f. thunbergii Makino, Arisaema serratum var. atropurpureum Engl., Arisaema serratum var. euserratum Engl., Arisaema serratum var. ionochlamys (Thunb.) Schott, Arisaema serratum var. japonicum Blume ex Yabe, Arisaema serratum var. latisectum Miq., Arisaema serratum var. viridescens Nakai, Arisaema sinanoense Nakai, Arisaema solenochlamys Nakai ex F.Maek., Arisaema speirophyllum Nakai & F.Maek., Arisaema speirophyllum subsp. boreale (Nakai) Govaerts, Arisaema takedae Makino, Arisaema thunbergii Blume, Arisaema thunbergii var. corniculatum Sakata, Arisaema thunbergii var. pictum Nakai, Arum serratum Thunb., Flagellarisaema thunbergii (Blume) Nakai, Flagellarisaema thunbergii var. corniculatum Sakata]
Arisaema serratum image
  • Japan Flora
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Japan Flora: Tuber depressed-globose, usually bearing a few small lateral tubers; leaf soli­tary, the petiole nearly erect, terete, 30-60 cm. long; leaflets 9-17, linear- to broad-lanceolate, acuminate, 10-25 cm. long and 1-4 cm. broad in the terminal one; peduncle arising from the lower part of the petiole, 10-20 cm. tall; spathe uniformly dark purple or reddish purple, sometimes purplish bronze, the blade ovate, strongly arching over the spadix, the upper part semipendulous and long-filiform tapering, 8-10 cm. long; spadix-appendage filiform, 30-50 cm. long, erect, pendulous at tip, gradually thickened below forming a densely wrinkled, fusiform enlargement and further narrowed toward the flo­riferous part.  Apr.-May.  

Tuber depressed-globose; leaves 2, petioled; leaflets 7-15, lanceolate, the terminal one 5-25 cm. long; peduncle 10-25 cm. long; spathe dark purple, the blade deltoid-lanceolate, 7-15 cm. long, 2-4 cm. wide, gradually tapering at tip, erect and bending forward horizontally; spadix-appendage narrowly cy­lin dric, the upper part bent slightly forward and rather thick, thickened and truncate at base.

Tuber depressed-globose, usually bearing a few small lateral tubers; leaf soli­tary, the petiole nearly erect, terete, 30-60 cm. long; leaflets 9-17, linear- to broad-lanceolate, acuminate, 10-25 cm. long and 1-4 cm. broad in the terminal one; peduncle arising from the lower part of the petiole, 10-20 cm. tall; spathe uniformly dark purple or reddish purple, sometimes purplish bronze, the blade ovate, strongly arching over the spadix, the upper part semipendulous and long-filiform tapering, 8-10 cm. long; spadix-appendage filiform, 30-50 cm. long, erect, pendulous at tip, gradually thickened below forming a densely wrinkled, fusiform enlargement and further narrowed toward the flo­riferous part.  Apr.-May.  

Tuber hemispherical, 3-7 cm. across, with rather many supernumerary young tubers and young shoots; pseu­dostem 30-70 cm. long, 2-3 cm. in diameter at base, 7-15 mm. above; scalelike leaves 4; normal leaves 2; leaflets 5-13, the terminal leaflet oblong or narrowly elliptic, petiolulate or nearly sessile, the lateral leaflets oblanceolate or oblanceolate- oblong; scape equaling or shorter than the leaves; spathe greenish, the tube 4.5-85 cm. long, whitish at base, 1.5-2 cm. in diameter, slightly recurved on upper margins, the blade dark green with white longitudinal stripes, orbicular-ovate or oval, 5-6 cm. long, 4-4.5 cm. wide, acuminate; spadix-ap- pendage 4-6.5 cm. long including the short stipe 3-10 mm. long, clavate, green, thickened at apex, about 5 mm. in diameter.                      

Hokkaido, Honshu (centr. and n., s. Kinki, Chugoku), Shi­koku, Kyushu

Arisaema serratum
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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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