• Scientific Name: Aristolochia hyperxantha X.X.Zhu & J.S.Ma
• Ref: Phytotaxa 313 (1):061. 2017
• Chinese Common Name: 鲜黄马兜铃 xiānhuáng mǎdōulíng
• Family: Aristolochiaceae
• Genus: Aristolochia
• Distribution: NW Zhejiang
• Photo: 06/12/2013, Baizhang Ridge, Zhejiang

Climbing shrub. Stems terete. Petiole 1–5 cm long, more or less villous; lamina long-ovate to ovate-triangular, 4–15 × 2–9 cm, thinly leathery, adaxially slightly villous or glabrous, abaxially sparsely villous, base cordate, sinus 0.5–2 cm deep, apex acute; veins palmate. Flowers axillary, solitary. Pedicel 1–3 cm long, often forming right angle with ovary, more or less white villous; bractlets conduplicate, 4–10 mm long, adaxially glabrous or sparsely villous, abaxially densely villous, inserted at base of pedicel. Calyx yellowish-white; tube geniculately curved, outside white villous, inside villous at base, glabrous above base; basal portion of tube 1.2–1.5 cm long, inside dark-purple at base, white with sparse purple spots or stripes above base, upper portion of tube 1.8–2.2 cm long, inside white with purplish-red spots; limb discoid, ca. 2 cm in diam., shallowly 3-lobed; lobes broadly ovate, bright-yellow, sparsely shortly pubescent; throat yellowish-white with dense brownish-black patches, triangular-ovate or orbicular, ca. 5 mm in diam. Anthers 6, oblong, ca. 1.5 mm long, adnate in 3 pairs to the base of gynostemium, opposite to the lobes. Gynostemium ca. 4 mm long, 3-lobed, apex of lobes usually obtuse, sometimes bilobate, margin crispate. Ovary terete, 5–9 mm long, densely white villous. Capsule cylindric, 3–4 × 1.5–2.5 cm, dehiscing basipetally. Seeds triangular-ovate, 3–4 × 3–4 mm. (Phytotaxa 313 (1):069. 2017)