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Weed Identification in Nurseries and Landscapes

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Pineapple weed - Matricaria discoidea DC.
Weed Identification in Nurseries and Landscapes > Pineapple weed
Pineapple weed seedling
Pineapple weed seedling.
Pineapple weed flowers Pineapple weed leaf
Pineapple weed flowers. Pineapple weed leaf.
Pineapple weed rosettes
Pineapple weed rosettes.
Life cycle: Pineapple-scented, fernlike winter or summer annual.

Reproduction: Seeds.

Flowers and fruit: Numerous greenish yellow flowers in a globe- to cone-shaped head are formed on the ends of branches. Light green bracts surround the base of the flower head. Damaged flowers emit a sweet pineapple odor. The seed is enclosed in a single-seeded, oblong and ribbed, light brown fruit.

Leaves: Alternate, very finely dissected, feathery or fernlike leaves are hairless and 0.5 to 2 inches long. Leaves initially develop from a dense basal rosette. Damaged leaves emit a sweet pineapple odor.

Stems: Short, hairless, erect or spreading stems with multiple branching from the base, up to 16 inches in height.
The MSU IPM Program maintains this site as an access point to pest management information at MSU. The IPM Program is administered within the Department of Entomology, fueled by research from the Michigan Agricultural Experiment Station, delivered to citizens through MSU Extension, and proud to be a part of Project GREEEN.
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Updated: 10/18/07