Herbs, tuberous, sprouting in late autumn from a disciform, vertically oriented tuber 2-5 cm in diam., 2-2.5 cm thick. Petiole mid-green, stained dull purple, terete, 10.5-28 cm × 2.5-4.4 mm. Leaf blade dark to mid-green, sagittate to sagittate-hastate, 11-30 × 4-12 cm, apex acute. Inflorescence not scented; peduncle exceeding leaves, pale green proximally, deep green distally, terete, 11-32 cm × 5-7 mm. Spathe 12-22 cm; tube outside green, inside white, oblong-cylindric, 2.5-4 × 1.2-1.6 cm, slightly constricted apically; limb erect at first but soon flopping forward, outside mid-green with faint purple staining, inside dull purple, deeper purple along middle, paler proximally, brownish purple to purple distally, narrowly lanceolate, 9-18 × 1-3 cm, acuminate. Spadix 2/3-3/4 as long as spathe limb, 9-20 cm in total length; female flowers in an oblong-cylindric cluster 15-17 × 5-6 mm; ovary pale greenish yellow, oblong, 2-3 mm; stigma pale grayish mauve; pistillodes in 3 or 4 whorls forming a zone 3-4 mm; bristles glossy deep violet, subulate-filiform, 3-4.5 mm; bases dark purple, bulbiform, verrucate; staminodes in 2 or 3 whorls forming a zone 3-5 mm; bristles flexuose, glossy deep violet, filiform, 2-2.5 mm; bases dark purple, barely conic, verrucate; interstices: proximal 2.5-3 mm cream-colored, longitudinally ridged; distal 1.5-2 mm cream-colored, smooth; appendix dull yellow to orange-brown, purple, or brownish purple, base paler, cylindric, tapering basally, 6-17 cm × 3-7 mm; male flowers in an oblong zone 6-7 × 4-5 mm; anthers and connectives maroon. Infructescence cylindric, 4-4.5 × 1.8-2.2 cm. Berries oblong, 4-9 × 3-4 mm. Fl. Apr-May.
Home