Aristolochia

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Aristolochia
Aristolochia baetica
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
(unranked): Magnoliids
Order: Piperales
Family: Aristolochiaceae
Subfamily: Aristolochioideae
Genus: Aristolochia
L.
Species

Over 500, see text

Aristolochia is a large plant genus with over 500 species of shrubs and herbs, many having medicinal properties. Collectively known as birthworts, pipevines or Dutchman's pipes, they are the namesake of the family (Aristolochiaceae). They are widespread and occur in the most diverse climates. Some species, like A. utriformis and A. westlandii, are threatened with extinction.

Isotrema is usually included here, but might be a valid genus. If so, it contains those species with a three-lobed calyx.