细柄芋 xi bing yu

Herbs, perennial. Tuber cylindric, 1-2 cm × ca. 5 mm, with many tubercles. Cataphylls lanceolate, 3-4 cm, membranous. Leaves 2 or 3; leaf blade oblong-elliptic, 10-17 × 5-8.5 cm, base 2-lobed, apex abruptly acuminate; lobes deltoid, 2-4 × 1-3 cm; primary veins multiple, pinnately diverging from midrib, secondary venation arching-anastomosing, intramarginal veins 3, conspicuous. Peduncles 2 or 3, 18-30 cm, very slender; cataphylls ca. 8 cm. Spathe ca. 5 cm; tube convolute, ca. 2 cm × 1-2 mm; limb spreading and finely reflexed, lanceolate, ca. 8 cm × 8 mm. Spadix ca. 4.5 cm; female zone ca. 1.5 cm, adnate to tube of spadix; ovaries 4-12, oblong, multistriate, 1-loculed, 1-ovuled; stigma disciform; sterile zone between male and female inflorescences ca. 7 mm, naked; male zone ca. 1.5 cm; male flowers peltate, hexagonal, apex ca. 5 mm; sterile male zone at apex of spadix ca. 7 mm, with minute synandrodes. Fl. Apr.

● Tropical forest; ca. 300 m. SE Yunnan (Hekou).