256 Araceae 



part of the spathe, the pistillate part adnate to the tubular part of spathe, separated from the staminate by the apical constriction 

 of the tubular spathe, the appendage filiform, slenderly elongate and long-exserted from the spathe; flowers naked, the staminate 

 with 1 or 2 anthers, the pistillate with a single 1-locular ovary containing a solitary orthotropous ovule; berry inclosing a single 

 seed with copious endosperm. Few species, in e. Asia. 



lA. Leaves 3-foliolate, the leaflets oblong to lanceolate, acute and mucronate at apex, with small bulbils on the petiole 1. P. ternata 



IB. Leaves deeply 3-parted, the segments broadly or narrowly ovate, short-acuminate; plant slightly larger, without bulbils. 2. P. tripartita 



1. Finellia ternata (Thunb.) Breitenb. Arum ternatum gustata Schott. Shika-hange. Leaflets linear. 



Thunb.; P. tuberijera Tenore; A. macrourum Bunge; Typho- 2. Pinellia tripartita (Bl.) Schott. Antherurus tripart- 



nium tuberculigerum Schott; Arisaema loureiri Bl. ^Ka- itus BL; Arisaema tripartitum (Bl.) Engler O-hange. 



RAsu-BiSHAKu. Leaves few from a small tuber, with small Tuber to 3 cm. across, covered with brown fibers; leaves 



bulbils borne at the middle and on the uppermost part of the petioled, deeply 3-lobed to nearly 3-parted, the segments 8-20 



petiole; leaflets 3, sessile, ovate-elliptic to oblong, 3-12 cm. cm. long, 2-12 cm. wide, abruptly short-caudate; scape 20-50 



long, 1-5 cm. wide, entire, glabrous; scape solitary, 20-40 cm. cm. long; spathe green outside, typically light purplish within, 



long; spathe typically green, 6-7 cm. long, the tubular part 6-10 cm. long, the tubular part 2-3 cm. long, the blades 



1.5-2 cm. long, the blade lanceolate, rounded at apex, curved broadly lanceolate, obtuse, slightly incurved at tip, smooth 



at tip, glabrous outside, puberulent within; spadix with the outside, densely papillose inside; spadix with a filiform ap- 



appendage filiform, erect, 6-10 cm. long, glabrous; berry small, pendage 15-25 cm. long. June-Aug. Honshu (Mino Prov. 



green. May-July. Cultivated fields and roadsides; Hole- and westw.), Shikoku, Kyushu. Forma atropurpurea 



kaido, Honshu, Shikoku, Kyushu; quite common. Korea (Makino) Ohwi. ^Murasaki-o-hange. Spathe dark pur- 



and China. Forma angustata (Schott) Makino. P. an- pie within. 



3. ARISAEMA Martius Tennan-sho Zoku 



(Synopsis by Dr. Tetsuo Koyama.) 



Perennial herbs with a depressed-globose tuber or corm, rarely rhizomatous; normal leaves 1 or 2, rarely 3, petioled or nearly 

 sessile, with 3-17 sessile or short-perioluled, reticulate-nervulose leaflets, the petiole arising from within a cluster of scapelike 

 sheaths (pseudostem) , these surrounded at base by 2 or 3 scalelike leaves (cataphylls) ; inflorescence solitary, terminal or pseudo- 

 lateral; spathe persistent, the tube cylindric, involute, the blade galeate or leaf like; spadix bisexual or unisexual (plants para- 

 dioecious, i.e., dioecious, but the sex reversible according to conditions), the staminate part above the pistillate, the appendage 

 somewhat elongate, terete, clavate, or sometimes filiform; staminate flower with 1 to 5 stamens; pistillate flower with a single 



1-locular ovary, with 1-9 orthotropous ovules; berries 1- to few-seeded; seeds ovoid-globose. About 150 species, chiefly of 



tropical and cooler regions of e. Asia, a few in Africa and N. America. 



lA. Spadix -appendage filiform, long-exserted from the spathe. 



2A. Normal leaves 2; spadix-appendage 10-15 cm. long, 2.5 to 3.5 times as long as the tube of spathe; terminal leaflet not smaller than 



lateral ones \. A. negishii 



2B. Normal leaf solitary; spadix-appendage longer. 



3A. Terminal leaflet much shorter than the adjacent lateral ones; pseudostem more than 40 cm. long; spathe nearly green. 



2. A. heterophylltim 

 3B. Terminal leaflet as large as or larger than the adjacent lateral ones; pseudostem nearly wanting; spathe dark reddish purple. 



4A. Spathe-blade with a T-shaped white mark inside; scape arising near base of petiole i. A. \iushianiim 



4B. Spathe-blade without a T-shaped mark; scape arising above base of petiole. 



5A. Enlargement at base of spadix-appendage densely wrinkled 4. A. thunbergii 



5B. Enlargement at base of spadix-appendage smooth 5. A. urashima 



IB. Spadix-appendage terete or clavate, obtuse or sometimes capitate at apex, shorter than the blade of the spathe. 



6A. Spadix-appendage gradually passing into the floriferous part; spathe and spadix-appendage different in staminate and pistillate 



plants 6. A. heterocephalum 



6B. Spadix-appendage truncate at base; spathe and spadix-appendage equal or nearly alike in staminate and pistillate plants. 



7A. Spathe-blade saccate-galeate; leaflets always 3, filiform at apex, rather thick, lustrous above, entire 1. A. ringens 



7B. Spathe-blade spreading, declined, or ascending anteriorly. 



8A. Leaflets always 3, with many subtranslucent papillae on margin; spathe-blade acuminate 8. ^. ternatipartitiim 



8B. Leaflets 3-15, pedate, the margins entire or loosely undulate to toothed; spathe-blade gradually or abruptly acute. 

 9A. Normal leaf solitary (rarely 2). 



lOA. Spadix-appendage rather stout, 3-10 mm. across, terete, or gradually thickened toward apex; spathe-blade deltoid-ovate, 

 3—5 cm. wide. 



IIA. Scape 3-10 cm. long, apparently lateral; leaflets somewhat palmate, without a rachis; Kyushu 9. A. naniim 



lis. Scape 15-50 cm. long. 



12A. Lateral leaflets 2(-3) on each side, nearly radiate; rachis slightly developed. 



13A. Spathe-blade obliquely ascending, 5-6 cm. long 10. A. robustum 



13B. Spathe-blade strongly declined over the spathe, 8-10 cm. long \\. A. ovale 



12B. Lateral leaflets 3-8 on each side; rachis, at least the lower part, well developed. 



14A. Leaflets obovate, abruptly short-acuminate; Izu Peninsula 12. A. izuense 



14B. Leaflets lanceolate to oblong-obovate, tapering toward apex; Kinki District and westward. 



