• Mayweed Chamomile Plant 215x150

Category A Weed

Sunflower family (Asteraceae)

Helpful Links

List of all Photo Credits

Mayweed chamomile (Anthemis cotula)


    • 0.5-2 ft. tall, highly branched and bushy


      • Alternate, finely and deeply divided, up to 2.5 inches long and sometimes hairy


        • Daisy-like; 0.5-1 in. diameter; yellow center with 10-15 white petals


          • Short, thick taproot


            • Grows best on disturbed sites; often infests roadsides, waste areas, landscaped areas and crop fields; known to occur in Douglas, Humboldt and Lyon counties

            • Annual; reproduces by seed

            • Foliage has a foul odor when crushed; reported to irritate the skin of livestock and change the milk flavor of lactating animals

            • Also known as dog fennel


              • Cultivation or mowing prior to seed set can be effective

              • Apply bromoxynil, dicamba, metsulfuron, picloram or tribenuron to actively growing plants