English: Slender dutchman pipe.
Chinese: Ma Dou Ling; Hance.
Synonym: Aristolochia recurvilabra.
Region: east Asia, China, Japan.
Habitat: roadside thickets, meadows in lowland; frost hardy; prefers moist soil; semi-shade to full sun.
Content: aristolochic acid.
Use: medicinal; leaves, cooked for food.

BotanyHerb; climbing; perennial; to 1 m tall, 1 m wide.
Flower: hermaphrodite; flowers from July to August.
Pollination by flies.
Habitat: woodland; dappled shade; medium, loamy, heavy, clay, moist, well-drained soils; semi-shade or no shade.