Pineapple Weed (Matricaria discoidea)

Growing in low waste areas, the pineapple weed closely resembles its cousin chamomile only without the petals and the height. 
Pineapple weed flowers and leaves can be used in salads, as a tea, or dried and crushed to be used as a flower. However the pineapple weed flowers may become bitter by the time the plant blooms (they're still okay to eat though). 
This great plant has been used for medicinal purposes including relief of gastrointestinal upset, infected sores, fevers, and postpartum anemia.