异子雪胆 yi zi xue dan

Zanonia heterosperma Wallich, Pl. Asiat. Rar. 2: 29. 1831; Alsomitra heterosperma (Wallich) M. Roemer; Gomphogyne heterosperma (Wallich) Kurz.

Tuber unknown. Stem slender, glabrous. Leaves pedately 3-5-foliolate; petiole 3-4 cm, glabrous; leaflets ovate-lanceolate, base attenuate, apex shortly acuminate; median leaflets 5-7 × ca. 1.5 cm; petiolule 3-6 mm. Plants dioecious. Inflorescence compound or simple; peduncle slender, slightly flexuous, glabrous. Male flowers: calyx segments subulate, ca. 1 mm, apex apiculate; corolla pale yellow to pale yellow-green, rotate, 3-4 mm in diam.; segments ovate-lanceolate, ca. 3 × 1 mm, glabrous, apex acuminate; filaments free, ca. 1 mm. Female flowers similar to male flowers; peduncle 5-11 cm; ovary conical. Fruit pale yellow-green, narrowly campanulate or claviform, 12-35 × 6-12 mm, glabrous, with distinct ribs, dehiscent at apex, 3-seeded in each locule. Seeds small, irregularly ovate, ca. 3 × 2 mm, ca. 1 mm thick. Fl. Sep-Oct, fr. Oct-Nov. 2n = 28.

Rain forests, evergreen broad-leaved forests; 100-2300 m. Yunnan [Myanmar, Thailand].