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The pineapple weed (Matricaria discoidea) belongs to Asteraceae (the Aster family). It is an annual herb that is native to North America and Northeast Asia. This herb grows in fields, gardens, roadsides and disturbed areas, and up to a height of 5-40 cm. The leaves are pinnately dissected and exude a chamomile (pineapple) aroma when crushed. The flowers bloom from March to September. The flower-head is cone-shaped, composed of dense-packed yellowish-green corollas, and lacking ray-florets. Pineapple weed has been used for medicinal purposes, including for relief of gastrointestinal upset, fevers, and postpartum anemia.
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