Description

Description. Semi-deciduous climbing shrubs. Stems terete. Petioles 2 - 5 cm long, densely pubescence; laminas ovate to narrowly ovate, 10 - 22 x 7 - 13 cm, adaxially sparsely pubescence, abaxially densely pubescence, base cordate, margin entire, apex acute; veins palmate, 2 - 3 pairs from base, lateral veins 3 - 5 - paired. Flowers axillary, sometimes on stems, solitary or paired; pedicels 1.8 - 5 cm, densely brown villous; bractlets 1 or 2, ovate, 3 - 5 mm long, adaxially glabrous, abaxially densely villous. Calyx tube geniculately curved, light yellow, abaxially sparsely villous; basal tube 1.8 - 2.5 cm long, inside black purple at base, dark red above base, upper tube 1.2 - 1.8 cm long, inside dark red; limb saccate, cylinder, slightly asymmetric, 2 - 3 x 1 - 1.7 cm, forming obtuse angle with upper tuber, inside dark red, densely processes, 3 - lobed, lobes triangle or wide triangle; throat ca. 6 mm in diam .. Anthers 6, oblong, ca. 1.5 mm long, adnate in 3 pairs to base of gynostemium, opposite to lobes. Gynostemium ca. 3 mm long, 3 - lobed. Ovary terete, ca. 12 mm long, densely brown villous. Fruit stem ca. 4.5 cm long, sparsely puberulous. Capsule obovate-elliptic, distinctly 6 - angled, sparsely puberulous on angles, ca. 6 x 2.5 cm (ca. 5 x 2.5 cm in dry specimens). Seeds ellipse, 5 - 6 x 3 - 4 mm, not winged, the adaxial surface deeply concave and the abaxial surface convex, wrinkled, both surfaces glabrous.

Common Names

Taxonomic Hierarchy

Kingdom: Plantae

Phylum: Tracheophyta

Class: Magnoliopsida

Order: Piperales

Family: Aristolochiaceae

Genus: Isotrema

Species: Aristolochia pseudoutriformis X.X.Zhu & J.S.Ma