The pineapple weed (Matricaria matricarioides) belongs to Asteraceae (the Aster family). It is an annual herb that is native to North America and Northeast Asia. Nowadays, it has become a cosmopolitan weed and also can be found in Hokkaido, Japan. This herb grows on waste grounds, footpaths or roadsides, and it can reach 10-40 cm in height. The leaves are pinnately dissected and covered with bristles. The cone-shaped, lacking ray-florets, yellowish-green flower-heads bloom from March to September. The flowers exude a chamomile aroma when crushed. They are edible and have been used in salads and to make herbal tea.