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dog-fennel, mayweed, mayweed chamomile, stinking chamomile, stinking mayweed

Habit Annuals, (5–)15–35(–90) cm, usually ill-scented.
Stems

green (sometimes red-tinged), usually erect, branched mostly distally or ± throughout, glabrous, glabrate, puberulent, or sparsely strigillose to strigoso-sericeous (glabrescent, hairs mostly medifixed) and gland-dotted.

Leaf

blades 25–55 × 15–30 mm, 1–2-pinnately lobed.

Peduncles

mostly (2–)4–6(–15) cm.

Involucres

5–9 mm diam., ± villosulous to arachnose.

Receptacles

paleate mostly distally;

paleae subulate to acerose 2–3+ mm (often gland-dotted).

Ray florets

10–15, styliferous and sterile;

corollas white, laminae 5–15+ mm.

Disc corollas

2–2.5 mm (sparsely gland-dotted).

Cypselae

1.3–2 mm, ribs ± tuberculate (furrows often gland-dotted);

pappi 0.

2n

= 18.

Anthemis cotula

Phenology Flowering (Apr–)May–Aug(–Oct).
Habitat Disturbed sites, clearings, fields, roadsides
Elevation 10–600(–1500+) m [0–2000(–4900+) ft]
Distribution
from FNA
AK; AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY; AB; BC; MB; NB; NF; NS; ON; PE; QC; SK; YT; Eurasia [Introduced in North America]
[WildflowerSearch map]
[BONAP county map]
Discussion

Anthemis cotula is a weed throughout North America.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 19, p. 538.
Parent taxa Asteraceae > tribe Anthemideae > Anthemis
Sibling taxa
A. arvensis
Synonyms A. foetida, Chamaemelum cotula, Maruta cotula
Name authority Linnaeus: Sp. Pl. 2: 894. (1753)
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