Aristolochia clematitis is commonly known as birthwort or European birthwort. It is a perennial herbaceous plant belonging to the Aristolochiaceae family. Here are some key points about Aristolochia clematitis:

Description:

Appearance: It is a climbing vine that can reach heights of up to 1.5 meters (5 feet). The stems are thin and twining, allowing the plant to climb and spread.

Leaves: The leaves are heart-shaped or kidney-shaped, with a smooth surface and a green color.

Flowers: The flowers of Aristolochia clematitis are distinctively shaped like a pipe or a Dutchman's pipe, which gives rise to the common name "Dutchman's pipe". They are yellow-green to brownish-purple in color and often not very showy.

Fruit: The plant produces cylindrical capsules containing numerous small seeds.

Habitat and Distribution:

Aristolochia clematitis is native to Europe, particularly the Mediterranean region, and parts of Asia.

It typically grows in open woodlands, along forest edges, and in disturbed habitats.