Description

Description. Shrubs climbing. Stems terete, irregularly striate, sparsely yellowish-brown pubescent or glabrous. Branchlets densely yellowish-brown pubescent. Leaf blade leathery, lanceolate to elliptic-lanceolate or linear-lanceolate, 5 - 15 x 1.5 - 3 cm, apex narrowly acuminate, base rounded or broadly cuneate, margin entire, adaxially glabrous except the pubescent midnerve and lateral veins, abaxially shallowly yellowish-brown pubescent, basal veins 3, lateral veins 5 - 8 pairs, conspicuous on both surfaces; petiole 1 - 1.5 cm long, slightly distorted, densely yellowish-brown pubescent. Cymes on old woody stems, 1 - 5 - flowered; pedicel 1 - 2 cm long, pendulous, densely yellowish-brown pubescent; bracteole ovate-lanceolate, ca. 4 x 2 mm, densely yellowish-brown pubescent; perianth tube horseshoe-shaped; basal portion of tube 2 - 2.5 x 0.6 - 1 cm, shorter than the upper part, near the base of inner dark purple, densely villous, outside of tube mauve, densely yellowish-brown pubescent; upper portion of tube 2.5 - 3 x 0.5 - 0.8 cm, inner yellow, with dark purple stripes; limb subrotund-peltate, 4 - 6 cm in diam., yellow, with dark purple mural-like stripes, abaxially densely brown pubescent, margin shallowly 3 - lobed, lobes apex mucronate; throat suborbicular, 0.5 - 1 cm in diam., yellow; anthers oblong, 2 - 4 x 1 mm, adnate to the gynostemium base, opposite to the lobes; ovary terete, ca. 1.5 x 0.3 - 0.5 cm, 6 - angled, densely brown pubescent; gynostemium 3 - lobed, margin glabrous and papillary. Capsule ellipsoid, 6 - 10 x 2.5 - 3.5 cm, 6 - angled, glabrous.

Common Names

Taxonomic Hierarchy

Kingdom: Plantae

Phylum: Tracheophyta

Class: Magnoliopsida

Order: Piperales

Family: Aristolochiaceae

Genus: Isotrema

Species: Aristolochia yachangensis B.G.Huang, Yan Liu & Y.S.Huang