Vegetative plants (rosette, left; bolted plant, right). Key characteristics: leaves are lobed in a similar fashion as dandelion; however, there are a row a conspicuous spines on the midvein of the lower leaf surface (below).
Flowers and fruit.
Seed. Seed are distinctly flattened with a scaly appearance. Seed have a pappus; but, it easily becomes detached. Length is approximately 3.0 to 4.0 mm.
Life cycle: variable; annual or biennial.