This is an inconspicuous little plant that is easily overlooked. There is another introduced Senecio sp. with a similar appearance. This species is Senecio viscosus (Sticky Groundsel), which has foul-smelling foliage that is covered with sticky glandular hairs. Unlike Common Groundsel, the floral bracts of this species never have black upper tips. While Common Groundsel often has hairs, they are non-glandular and the foliage isn't foul-smelling. Some authorities assert that Common Groundsel is always without hairs, but this isn't true.
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