Anthemis (Asteraceae), common names: stinking mayweed, chiggerweed, dillweed, dog daisy, dog's chamomile, dog's fennel, fetid chamomile, flake, hog fennel, Johnny Appleseed's weed, madders, maise, mather, mathes, manthern, mawthern, mawther, maythic, mayweed, mazes, moithern, morgan, Morgan's weed, ox-eye chamomile, pathweed, pigsty daisy, stinking chamomile
Stinking mayweed is an annual weed which mainly germinates in spring. It can be found in crops sown in spring, and also pastures that are not very dense during spring. Low density of pastures in spring is often due to treading damage over winter, or if they are newly established. Once present in pastures, most livestock prefer not to eat it, allowing it to dominate the pasture. If lactating cows do eat it, tainting of milk can occur. It grows upright but tends not to grow much taller than 20-50 cm.
In pastures, stinking mayweed will eventually disappear by itself once it flowers because it is an annual, and management of the pasture should endeavour to improve density in the following late winter to early spring to prevent it establishing again.