Pineapple weed – Matricaria discoidea

Pineapple weed plant

Pineapple weed plant

Pineapple weed flower

Pineapple weed flower

Pineapple weed rosette

Pineapple weed rosette

Pineapple weed

Matricaria discoidea DC.
Asteraceae (Aster family)
Life cycle
Pineapple-scented, fernlike winter or summer annual.
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.
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.
Reproduction
Seeds.