Arisaema lidaense J.Murata & S.K.Wu

Plants to 30(–40)cm tall, but usually smaller. Tuber depressed globose, 1–2cm in diam., with distinct axillary buds. Cataphylls 2 or 3, surrounding pseudostem, purplish green, without distinct marks. Leaf usually 1, expanding earlier than inflorescence; petiole 20–40cm, proximal (3–)5–12(–15)cm sheathing into pseudostem; leaf blade 3-foliolate; leaflets sub-sessile, subequal in size; central one narrowly elliptic, 7–14(–16) × 2–4.5(–5.5)cm, base attenuate, apex long acuminate; lateral ones oblique. Inflorescence bisexual after sex change; peduncle usually shorter than petioles (much shorter in bisexual inflorescence), 8–15cm, downcurved when fruiting. Spathe green with white patch on back of throat, 4–9cm; tube narrowly cylindric, 2.5–5cm, not expanded at throat; limb ovate to broadly ovate, 1.5–4cm, apex acuminate. Bisexual spadix narrowly cylindric; female zone to 1.4cm; female flowers congested, green, ellipsoid; male zone to 10mm; male flowers with white or purple anthers; appendix upright or weakly in-curved, green, usually without projections, gradually narrowed to apex, not exserted from spathe, 3–4.5cm. Infructescence pendulous. 2n = 24*.