Native to Europe, but common along the West Coast and found to the Atlantic Coast.
An annual or short-lived perennial, found most often in wet soils. It may be a problem in irrigated pastures and grain fields, and like most other buttercup species may be toxic to livestock.
Mature plants may be as tall as 18 inches and have very thick, fleshy foliage. Stems usually are strong and upright and stems and leaves are hairless.
Leaves are broad and heart shaped on the lower stem, but long and narrow on upper areas. All leaves are divided into lobes, and on the lower leaves these lobes may be divided again into smaller, shallow lobes. The flowers occur singly on short stalks, and each flower has 5 large, bright yellow petals
The prominent characteristic of this plant is the seed pod, which is large, green, and made up of many boat-shaped pods, each of which is covered with stout, curved spines.
Characteristicts Important to Control:
Excessively wet soils are most conducive to the growth of this weed, and re-growth may occur from the roots if physical removal is attempted.