Anthemis cotula

Linnaeus

Sp. Pl. 2: 894. 1753

Common names: Mayweed stinking chamomile camomille maroute
Synonyms: Anthemis foetida Lamarck Chamaemelum cotula (Linnaeus) Allioni Maruta cotula (Linnaeus) de Candolle
Treatment appears in FNA Volume 19. Treatment on page 538. Mentioned on page 542.
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.

Phenology: Flowering (Apr–)May–Aug(–Oct).
Habitat: Disturbed sites, clearings, fields, roadsides
Elevation: 10–600(–1500+) m

Distribution

V19-937-distribution-map.gif

Alta., B.C., Man., N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que., Sask., Yukon, Ala., Alaska, Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Minn., Miss., Mo., Mont., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., N.Dak., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis., Wyo., Eurasia.

Discussion

Anthemis cotula is a weed throughout North America.

References

None.

Lower Taxa

No lower taxa listed.