Source: NRCS,[1] GRIN[2] Matricaria discoidea, commonly known as pineappleweed,[3] wild chamomile, disc mayweed, and rayless mayweed, is an annual plant native to North America and introduced to Eurasia where it grows as a common herb of fields, gardens, and roadsides.

The flower head or pseudanthium is cone-shaped, composed of densely packed yellowish-green corollas, and lacking ray-florets.

It is native to North America, from central Alaska south to California and Texas and east to Nova Scotia and Newfoundland.

[7] It has been introduced widely in the northern hemisphere[5] and is common and naturalized throughout Britain where it is one of the fastest-spreading plants in the 20th century.

[8][9] The greens can be washed and eaten, and both the flowers and the whole plant can be steeped to make tea,[10] described as "excellent" by one field guide.