Aristolochia zollingeriana Miq.

Herbs twining. Stems 6-angled, glabrous. Petiole 1.5-3.5 cm, glabrous; leaf blade triangular-ovate to rhombic-cordate, 5-7 × 5-7.5 cm, abaxially densely puberulous, adaxially glabrous, veins palmate, 2-3 pairs from base, base shallowly cordate, apex acute. Racemes in axils of leafy shoots, 3- or 4-flowered, 1-4 cm. Pedicel ascending, ca. 1 cm, glabrous; bractlets ovate, ca. 1.5 × 1 mm. Calyx brownish purple, 3-5 cm; tube rectilinear or slightly curved; utricle globose, ca. 5 mm in diam., with stipe 2-3 mm; tube 8-10 × 3-5 mm; limb ligulate, oblong, 1.5-2.5 × 0.3-0.5 cm, apex obtuse. Anthers ovoid, ca. 1 mm. Gynostemium 6-lobed. Capsule cylindric, 5-6 × ca. 2 cm, dehiscing acropetally. Seeds ovoid-deltoid, ca. 7 × 6 mm, winged. Fl. Jul, fr. Aug.

Dense forests. Taiwan [Indonesia, Japan, Malaysia].

Aristolochia kankauensis Sasaki; A. roxburghiana subsp. kankauensis (Sasaki) T. Yamazaki; A. tagala var. kankauensis (Sasaki) T. Yamazaki [“kankaoensis”].