Plants dioecious. Tuber renewed seasonally, brown outside, yellowish white inside, subglobose, 3-4.5 cm in diam., usually with tubercles. Cataphylls 3, brown with purple dots, membranous, inner one 7-15 cm, purplish brown with whitish spots. Leaf solitary; petiole purplish brown with some whitish dots, 20-37 cm, basal 4-5 cm sheathing into pseudostem; leaf blade 3-foliolate; leaflets sessile, sometimes shortly petiolulate, green, broadly ovate or subrhombic, subleathery, base broadly cuneate or rounded, margin entire, apex acute or abruptly acuminate; central leaflet 6-15 × 6.5-13 cm; lateral leaflets smaller, 5.5-13 × 4.5-10 cm, base oblique. Peduncle purplish brown with tiny whitish dots, shorter than petioles, 13-24 cm. Spathe purple or purplish red, with whitish or greenish longitudinal lines, 7-10 cm in total; tube broadly cylindric, ca. 2.5 × 1.3-1.5 cm, throat margins slightly recurved; limb erect or slightly recurved, ovate-lanceolate, 3.5-4 cm, apex long acuminate, with a connective whitish intramarginal line along distal part. Spadix unisexual; female zone subconic, ca. 10 × 6-7 mm; ovary green, obconic; ovules 3, basal, erect; stigma sessile, disciform; male zone cylindric, 9-15 × 2-3 mm; synandria of 1 or 2 stamens; anthers sessile or distal ones subsessile; thecae purple, globose, opening by an apical pore. Appendix whitish purple proximally, dark purple distally, 6-7 cm (including stipe), base swollen, 3-4 mm in diam., attenuate into stipe ca. 10 × 1 mm. Fl. Jun-Jul.
Home