260 



Araceae 



spadix-appendage narrowly cylindric, slightly bent forward 

 and somewhat thickened at apex, slightly thickened and trun- 

 cate at base.- Apr-May. Honshu (Shimotsuke, Musashi, 



Sagami, Idzu, Shinano, Ugo and elsewhere). 

 Var. atrolinguum (F. Maekawa) Kurata. A. atrolinguum 



F. Maekawa Kuro-hashi-tennan-sho. Blade of spathe 



dark purple, slightly arching over the spadix. Honshu 



(Sagami, Idzu). 



20. Arisaema maximowiczii (Engl.) Nakai. A. ser- 



ratum var. ■maximowiczii Engl. ^Tsukushi-mamushigusa. 



Related to A. monophyllum; tuber depressed-globose; pseu- 

 dostem 12-37 cm. long; leaf single, on a petiole about 6.5 cm. 

 long; leaflets 7-11, oblong-lanceolate, acuminate, the terminal 

 one larger, 9-10 cm. long, 17-35 mm. wide; peduncle 5-6 cm. 

 long; spathe greenish, the upper margins of the tube strongly 

 recurved, the blade ovate, 3-4 cm. long, about 2 cm. wide, 

 acuminate, greenish; spadix-appendage narrowly cylindric, 

 rounded and about 1 mm. across at apex, gradually thickened 

 to 5 mm. in diameter at base. Apr.-June. Kyushu. 



21. Arisaema sikokianum Fr. & Sav. A. sazensoo Ma- 

 kino; A. magnifictim Nakai Yuki-mochi-s6, Kanki-s6. 



Tuber depressed-globose; pseudostem 5-20 cm. long; leaves 2, 

 the petiole terete, 7-12 cm. long; leaflets 3-5, obovate, oblong, 

 or elliptic, 5-20 cm. long, 3-10 cm. wide, abruptly short- 

 acuminate; peduncle 5-12 cm. long; spathe dark purple, the 

 upper margins of the tube not recurved, the blade obliquely 

 ascending, narrowed toward base, elliptic, 8-13 cm. long, 4-5 

 cm. wide, abruptly long-acuminate; spadix-appendage thick- 

 cylindric, whitish, 6 mm. wide, capitately thickened at apex 



forming a globose head 10-18 mm. across. May-June. 



Honshu (Yamato), Shikoku, Kyushu. 



22. Arisaema kishidae Makino. Murou-mamushigusa. 

 Tuber depressed-globose; pseudostem 17-35 cm. long; leaves 2, 

 the petioles 5-15 cm. long; leaflets 5-9, oblong to ovate, 

 abruptly long-acuminate, the terminal one 5-20 cm. long, 2-8 

 cm. wide; peduncle 5-8 cm. long; spathe purplish, the upper 

 margins of the tube slightly recurved, the blade obliquely de- 

 clined, broadly deltoid-lanceolate, 10-13 cm. long, gradually 

 elongate at tip, forming a rather short taillike apex, dark 

 purple with vertical white stripes; spadix-appendage thick- 

 cylindric, not or scarcely thickened at apex, slightly thickened 

 and truncate at base. Apr .-May. Honshu (s. Kinki Distr.). 



23. Arisaema tosaense Makino. Ao-tennan-sho. Tu- 

 ber depressed-globose; pseudostem 10-30 cm. long; leaves 2, 

 the petioles terete, 5-10 cm. long; leaflets 7-15, narrowly ovate 

 to broadly oblanceolate, abruptly tapering to a rather short 

 taillike apex, the terminal one 15-25 cm. long, 3-12 cm. 

 wide; peduncle 3-30 cm. long; spathe dark green with white 

 longitudinal stripes, the upper margins of the tubular part 

 recurved, the blade green, 15-25 cm. long, broadly deltoid- 

 lanceolate and obliquely declined, scarcely narrowed toward 

 the base, gradually tapering toward tip to a tail nearly as long 

 as the body of the blade; spadix-appendage usually thickened 

 and clavate in upper part, rounded at apex, 5-10 mm. in 

 diameter, slightly narrowed and truncate at base. June- 

 July. Honshu (Kinki and Chiigoku Distr.), Shikoku, Kyu- 

 shu. 



24. Arisaema longilaminum Nakai. Murou-tennan- 

 SHO. 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 cy- 

 lindric, the upper part bent slightly forward and rather thick, 

 thickened and truncate at base. Honshu (s. Kinki Distr.). 



25. Arisaema angustifoliatum (Miq.) Nakai. A. ja- 



ponicum var. angustijoliatum Miq. ^Nagaha-mamushigusa. 



Tuber depressed-globose; leaves usually 2, sometimes 1, petio- 

 late; leaflets 9-12, lanceolate, acuminate, about 13 cm. long; 

 spathe usually purple, the upper margins of the tube slightly 

 recurved, the blade deltoid-lanceolate, 4.5-6 cm. long, ob- 

 liquely declined, gradually tapering toward the apex; spadix- 

 appendage erect, thickened at both ends, especially at base. 

 Mar.-May. Kyushu. 



26. Arisaema shinanoense Nakai. Karuizawa-tennan- 

 SHO. Tuber globose; pseudostem 15-30 cm. long; leaves 2, 

 the lower one on a petiole 7-12 cm. long; leaflets 7-9, broadly 

 lanceolate, abruptly acuminate, the terminal one 12-15 cm. 

 long, 2.5-5 cm. wide; peduncle 10-20 cm. long; spathe dark 

 purple, the upper margin of the tube slightly recurved, trun- 

 cate, the blade deltoid-lanceolate, 5-9 cm. long, gradually 

 long-acuminate, scarcely narrowed toward the base, obliquely 

 declined; spadix-appendage purple, narrowly cylindric, slighdy 

 bent forward, 2-3 mm. thick, slighdy thickened at both ends. 

 • June-July. Honshu (near Karuizawa in Shinano). 



27. Arisaema yamatense (Nakai) Nakai. A. japoni- 

 cum var. yamatense Nakai Yamato-tennan-sho. Pseu- 

 dostem rather long; leaves 2, the petioles 2-3 and 5-12 cm. 

 long respectively; leaflets 7-11, pedate, broadly oblanceolate, 

 7-12 cm. long, 2-3 cm. wide, long-acuminate; peduncle 2-3 

 cm. long; spathe green, the upper margins of tube recurved, 

 the blade ovate to broadly so, 4-7 cm. long, abruptly short- 

 acuminate, scarcely narrowed toward base, obliquely ascend- 

 ing, densely yellowish, papillose inside; spadix-appendage 

 nearly erect, narrowly cylindric, the upper part gradually nar- 

 rowed to the abruptly thickened capitellate apex 2-3 mm. 



wide. ^Apr.-May. Woods; Honshu (Kinki Distr. and Kaga 



Prov.). 



Var. sugimotoi (Nakai) Kitam. A. sugimotoi Nakai 



Suruga-tennan-sho. Spathe-blade abruptly long-acuminate, 

 nearly as long as the tubular part; spadix-appendage usually 

 recurved above. Honshu (Tokaido Distr.) . 



28. Arisaema proliferum Nakai. Ko-mochi-tennan- 

 SHO. Tuber hemispherical, 3-7 cm. across, with rather 

 many supernumerary young tubers and young shoots; pseu- 

 dostem 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 4.5-8.5 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. distr.). 



29. Arisaema speLrophyllum Nakai. Uzumaki-tennan- 

 SHO. Tuber depressed-hemispheric, without lateral tubers; 

 pseudostem 30-60 cm. long, 2-4 cm. in diameter at base; 

 leaves 2, the lower one with a petiole 5-7 cm. long; leaflets 

 16-22, pedate, the median and adjacent laterals petiolulate, 

 the others sessile or nearly so and spirally disposed, broadly 

 ovate, oval, or obovate; peduncle slightly longer than the 



