Disc mayweed

Matricaria discoidea, the pineappleweed or disc mayweed, is a low, bushy, aromatic annual herb of the daisy family, 5 to 40 cm tall, with smooth, branching stems. The leaves are alternate and finely divided two or three times into short, thread-like segments, giving a feathery appearance. Its most distinctive feature is the flower head: a small, cone-shaped, greenish-yellow disc composed entirely of tiny tubular florets, lacking the white ray florets of true chamomiles. When crushed, the heads release a strong, sweet, pineapple-like fragrance that gives the plant its name. Native to northeastern Asia and northwestern North America and now a cosmopolitan weed, it thrives on compacted, disturbed ground such as paths, roadsides, gateways, and waste places.