Arisaema schimperianum

Herb to 200 cm tall. Tuber discoid to depressed-globose, up to 5 cm diam. or more. LEAVES 2-3. Petioles with basal sheaths imbricate forming green pseudostem to about 75cm or more, free apical part of petiole 5-40 cm long. Leaf-blade radiately divided to base, circular in outline, leaflets (5-) 9-15, subequal in size, usually narrowly elliptic to elliptic or narrowly oblanceolate, rarely obovate, 4-5-27 x 1-9 cm, acuminate, base cuneate, margins usually finely serrate-dentate with acuminate teeth up to 2 mm long, rarely subentire. INFLORESCENCE equalling or overtopping leaves, free part of peduncle 9-35 cm long, green. Spathe 8-31 cm long; tube cylindric to narrowly obconic, not or hardly constricted apically, 3-12 x 0-8-3 cm, outer surface green with white to yellow longitudinal stripes along veins; limb oblong-lanceolate, sometimes ovate, 5-21-5 x 1-5 cm, shorter or longer than tube, sometimes with very long filamentous tip, green, rarely purple-brown tinged. Spadix usually unisexual, rarely with flowers of both sexes present, 3-8-12-8 cm long, slightly longer than spathe tube; sterile appendix cylindric to conic, 2-9 x 0.2-1.4 cm, narrowed basally, sometimes truncate with stipe up to 1 cm long, apex rounded, pale green to yellowish green; staminate spadix + sessile, fertile part subcylindric, 1.4—4.3 x 0.4-0.8 cm, flowers + distant; pistillate spadix ± sessile, fertile part gradually tapering upwards, 3-5 x 1-2-1-3 cm, flowers congested to ± distant. Staminate flower composed of 2-3 stamens, anthers dehiscing by sub-circular oblique apical slits. Pistils ovoid, 3-4.5 mm long, green, ovary 2-2.5 mm diam., tapering to short style with capitate whitish stigma. INFRUCTESCENCE: Berries subglobose, 0.5-0.8 cm diam., scarlet when ripe, green with yellowish stripes when immature, 3-4 seeded; seeds about 4mm diam.