water dropwort, water parsley
Could be confused with
temperate regions of Northern Hemisphere
Species commonly cultivated
Oenanthe aquatica (L.) Poir. (Asia, Europe)
O. javanica (Blume) DC. (Asia, Australia)
Oenanthe aquatica and O. javanica are introduced into the United States.
information not available
emergent, stoloniferous herb
Perennial, biennial, or annual. Stems floating, creeping, ascending or erect, frequently stoloniferous, internodes may be swollen if floating. Leaves pinnatisect, bi- to tri-pinnate; submerged leaves divided into capillary or fan-shaped segments. Inflorescence a compound umbel, terminal or axillary; subtending bracts inconspicuous or absent. Flowers small, white; sepals 5, conspicuous; petals 5. Fruit 2 1-seeded mericarps. Dispersal of mericarps by water or animals.
wet or marshy ground, shallow waters
Some species are extremely poisonous to mammals, being rich in oenanthotoxin.