攀援黄堇 pan yuan huang jin

Type: China. W Yunnan: Lushui Xian, Luobenzhuo Xiang, E’ ga Cun, vicinity of pass from China to Myanmar at border marker 27, E side of Gaoligong Shan, 26°26′30″N, 98°45′30″E, N-facing 30°-60° slope, alt. 3400 m, "Abies forest, and bamboo thickets, undisturbed. Scandent herb, ca. 2 m. Occasional. In loam on granite," 9 Aug 2005, Gaoligong Shan Biodiversity Survey (GSBS) 25904 (holotype, KUN; isotypes, CAS, UPS).

Corydalis ampelos caulibus longis scandentibus a speciebus affinibus facile distinguitur.

Paratypes: GSBS 25645 (CAS, KUN, UPS), GSBS 25936 (CAS, KUN, UPS).

Herbs (perennial), scandent, 2-4 m tall. Basal parts unknown. Stems 3-5 mm in diam. (thinner distally), with numerous leaves, much branched; accessory branches common. Middle cauline leaves: petiole ca. 6 cm; blade glaucous abaxially, triangular, 10-15 × 14-18 cm, triternate; primary and secondary pinnae long petiolulate, ultimate leaflets shortly stalked, decurrent on petiolule, ovate, 1.5-3 × 1-2 cm, lobed into 3-6 broadly obovate to oblong obtuse lobes not overlapping. Leaves of lateral branches much smaller and less divided, shortly stalked to sessile. Racemes several at stem and branch tips, 10-25-flowered, simple or with a basal branch; bracts lanceolate, 1.5-3(-5) mm, acute. Pedicel 4-6 mm, thin, straight in flower, recurved in fruit. Sepals ca. 0.5 × 1 mm, dentate. Corolla yellow; outer petals with broad limb abruptly narrowed into acuminate apex; upper petal 14-16 mm, with crest attenuate in both directions, reaching almost to tip of spur; spur strongly upcurved, cylindric, 8-9 mm; nectary 2/3-3/4 as long as spur, very thin; lower petal prominently acuminate, crest small; inner petals 8-9 mm, claw slightly shorter than limb, dorsal crests rounded, clearly overtopping apex. Ovary with 13-15 ovules; stigma with narrow median sinus closely flanked by a long stipitate papilla on each side; basal lobes very prominent. Fruit and seeds unknown. Fl. Aug.

● Undisturbed forests on granite substrate; 3000-3500 m. W Yunnan (Gaoligong Shan).

Corydalis ampelos differs from other species in the C. yunnanensis group by the scandent habit with up to 4 m long stems and the very different leaves.

The specific epithet refers to the scandent habit of the plants, from Greek άμπελος (ampelos, "vine").