About Senecio viscosus L.
Senecio viscosus L. is an annual plant that reaches 70 cm in height and is covered with glandular hairs. It is very similar to Senecio sylvaticus, which lacks glandular hairs. Its outer bracts have brown tips. The ray-florets are ligulate and yellow; they spread out when they first open, then roll backward. Its leaves are alternate and deeply lobed. Unlike Senecio viscosus L., Senecio vulgaris, also called Groundsel, does not produce ray florets. It is locally common on waste ground across Britain and Ireland. This species has been introduced to the United States and Canada, according to the USDA Plants database. In the United States, it has been recorded in Pennsylvania, New York, Vermont, New Hampshire, Maine, Massachusetts, Connecticut, Rhode Island, Michigan, Wisconsin, Illinois, Idaho, and Alaska. In Canada, it has been recorded in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, New Brunswick, Nova Scotia, Prince Edward Island, and Newfoundland and Labrador.
