Credit: Margaret Williams @ USDA-NRCS PLANTS Database
Native to Europe, naturalized in many parts of the eastern and north central portion of North America.
Two distinct syndromes are associated with poisoning. The first is called "dew poisoning", and is associated with a photosensitivity reaction: sunburn on nonpigmented skin. Affected areas become painful and form ulcerations, and inflammation/ulceration of the mouth and tongue may also occur along with colic and diarrhea, depression or excitation. The second syndrome is associated with recurring bouts of a condition known as "big liver disease"; animals develop a yellowish discoloration of membranes around the mouth, eyes and nonpigmented areas of skin, accompanied by weight loss, central nervous system depression, loss of appetite, incoordination, dark, discolored urine and a greatly enlarged, fibrotic liver.
Toxic to Horses