A small mayweed with a smell resembling that of pineapple, having flowers that lack ray florets.
- Genus Matricaria, family Compositae: the European M. matricarioides and the North American M. discoidea
- 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.
- Pineapple weed is a problem in spinach and other vegetable crops.
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