Anthemis cotula L.

Family: Asteraceae, Tribe: Anthemideae

Pertinent Synonyms & Notes (particularly those used in California; go to GRIN for other synonyms)


Pertinent Common Names (particularly those used in California; go to GRIN for other common names)

mayweed, stinking chamomile

Primary Disseminule Type


Description (diagnostics are in brown)

Fruit a cypsela, oblong to oblanceolate or obcuneate, narrowed slightly at apex, sometimes slightly curved, cross-section terete, 1.8–2.4 mm long x 0.6–0.8 mm diameter. Surface glabrous, with 10 tubercled ribs (rarely smooth, furrows often gland-dotted), pale yellow to orangish-brown. Pappus none.

Style base cylindrical, whitish, sitting atop a round mound.

Fruit attachment scar at base, protruding, typically obliquely positioned, inconsistently- and irregularly-shaped, ± flanged, granular, whitish, relatively large.

Risk Assessment (codes in yellow or red indicate cause for concern; assessments are current as of mid-2011; click AUQP, NZBORIC, or NZBPI for access to the most recent versions of these databases and possible assessment changes)