Jacobaea aquatica or Senecio aquaticus, the water ragwort[1] or marsh ragwort,[2] is a plant of the family Asteraceae. It is a perennial or biennial plant: young plants form a rosette near the ground, eventually producing a taller flowering shoot with many bright yellow flower heads, each with prominent ray florets. It grows in damp, grazed grassland, especially where there has been some disturbance.

Jacobaea aquatica
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Jacobaea
Species:	J. aquatica
Binomial name
Jacobaea aquatica (Hill) G.Gaertn., B.Mey. & Scherb.
Synonyms
Senecio aquaticus Hill Senecio jacobaea subsp. barbareifolius Krock. Senecio pratensis Richt.

Biogeography

Jacobaea aquatica is endemic to Europe. It may be found throughout the continent, except Finland and Eastern Europe. There are small populations in the European part of Turkey and on Svalbard.

References

• The Global Compositae Checklist
• The Plant List
• "Jacobaea aquatica". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA).