A small mayweed with flowers that lack ray florets. When crushed, the leaves have a pineapple fragrance.
- ‘Pineapple weed is a problem in spinach and other vegetable crops.’
- ‘Pineapple Weed is a common plant in central and northern Illinois, but somewhat less common in the southern areas of the state.’
- ‘Pineapple Weed has since spread to northern and western Europe, where it is not native.’