Arisaema grapsospadix Hayata

Rhizome oblong-ovoid, 3–5 × 1.5–2.2cm. Leaves 2(or 3); petiole 18–30cm, proximal 13–25cm sheathing into pseudo-stem, dull purplish green, mottled with dark purple and orange, surrounded by several cataphylls; leaf blade 3- or 5-foliolate; leaflets base rounded to cuneate, margin entire, apex acute to acuminate, often mucronate at tip; central leaflet with petiolule 1–2.5cm, blade elliptic to lanceolate; lateral leaflets with petiolule 3–10mm, blade lanceolate to oblong, oblique at base. Spathe greenish on both surfaces with a semilunate white spot in throat; tube cylindric, (3–)4–6 × 1–1.7cm; limb triangular-ovate, 1.5–2cm wide, apex acute. Spadix bisexual in mature plants; female zone ca. 2.5cm × 5mm; ovary obliquely conic-ovoid; stigma subsessile, pilose; ovules 4; male zone ca. 1.8cm × 4–5mm; synandria lax, of 3 stamens; anthers dehiscing by 2 apical pores; appendix narrowly pyramidal, 6–7cm, distal part filiform and weakly curved, distal 1.2–2cm covered with filiform neuter flowers ca. 3mm. Berries red, conic-ovoid. Seeds 2 or 3, cream-yellow spotted with dark purple.