Scientific NameSenecio viscosus
Seedlings are hairless with oblong 3-11 mm long by 1-3 mm wide cotyledons. Mature plants have numerous branches reaching 75 cm and are covered with sticky hairs.
Covered in short sticky hairs and alternate in arrangement leaves generally measure 3-12 cm long and are 1-5 cm wide. Stalkless and clasping, upper leaves are coarsely toothed to irregularly lobed. Meanwhile lower leaves are wavy-margined to deeply lobed.
Hollow stems, sticky hairs covering the entire plant with yellow flower heads composed of disc florets.
Flower Seed Head
7-15 mm across the flower heads are made up of 6-9 mm long yellow disk florets and a row of yellow-green floral bracts. Flower heads appear on the ends of branches.
The fruit a single-seeded achene contains a seed with 5-10 obvious veins ovate in shape, tan in color and 2-3 mm long. 3-4 mm long white bristles make up the pappus which aids is dispersal. A single plant can produce as many as 1,500 seeds
Waste areas, railway grades, and roadsides are common homes for sticky groundsel.
woody bush or tree
Thorns or Spines
Approximate Flower Diameter
Dominant Flower Color