Berula erecta, known as lesser water-parsnip, cutleaf waterparsnip, or narrow-leaved water-parsnip,[4] is a member of the carrot family. Growing to around 1 m (3 ft) tall, it is found in or by water.[5] It is widespread across much of Europe, Asia, Australia, and North America.[6][4][7][8]
Berula erecta has a hollow stem. Underwater leaves consist of compound with thread-like lobes; leaves above the surface of the water are flatter and broader. The plant produces many small white flowers in a compound umbel.[7]
^illustration from Prof. Dr. Otto Wilhelm Thomé Flora von Deutschland, Österreich und der Schweiz 1885, Gera, Germany