Description from Flora of China
Anthemis foetida Lamarck; Maruta cotula (Linnaeus) Candolle; M. foetida (Lamarck) Cassini.
Herbs, annual, (15-)30-50 cm tall, fetid; stems erect, corymbosely branched, sparsely pubescent or subglabrescent. Leaves sessile; leaf blade ovate-oblong, 1.5-6 × 0.5-3 cm, 2-pinnatisect; ultimate segments narrowly linear. Capitula terminal, solitary, long pedunculate, 1-2 cm in diam. Involucre hemispheric; phyllaries in 3 rows, oblong, scarious margin narrow, apex obtuse. Ray florets white; lamina 5-14 × 3-6 cm, elliptic. Disk florets yellow, tubular, 5-lobed. Achenes oblong-turbinate, 1-1.5 mm, tuberculate, obscurely 8(-10)-ribbed. Corona absent. Fl. and fr. Jun-Jul. 2n = 18.
Anthemis cotula has been recorded as a weed from E Mongolia and can be expected to behave similarly in China.
Cultivated and possibly naturalized. Nei Mongol [native to N Africa, SW Asia, and Europe; introduced elsewhere].