2. Anthemis cotula L. (Mayweed, dog fennel, stinking
chamomile)
Pl. c–e;
Map 940
Plants aromatic
with an unpleasant odor. Stems 10–50(–80) cm long, erect or
ascending, usually branched above the midpoint. Leaf blades 1–6 cm
long, oblanceolate to elliptic or ovate, deeply 2 or 3 times pinnately lobed,
the basal lobes sometimes appearing fascicled, the ultimate segments
0.5–4.0(–8.0) mm long. Heads mostly long-stalked, the stalks
3–8 cm long at flowering. Involucre 2.5–5.0 mm long. Receptacle
with chaffy bracts confined to the central portion. Ray florets sterile, the
corolla 5–9 mm long, sometimes inconspicuously glandular. Disc florets
with the corolla 1.5–3.0 mm long, the lobes often minutely glandular.
Fruits 1–2 mm long, the ribs appearing strongly cross-wrinkled or
tubercled, often also with glands between the ribs. 2n=18.
May–October.
Introduced,
scattered nearly throughout the state (native of Europe, introduced widely in North America). Openings of bottomland forests, banks of streams and rivers, and rarely
glades; also crop fields, fallow fields, orchards, barnyards, ditches,
railroads, roadsides, and open, disturbed areas.