Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
A Eurasian species, thoroughly naturalized in all kinds of disturbed places and weedy areas including dumps, parking lots, around buildings and old foundations, fields and thickets, roadsides and railroads, shores, and flower beds. Reported by the First Survey (1838) and collected as early as 1843 in Macomb Co.
This familiar strongly aromatic plant is rather gray-green in aspect, from the pubescence on the stems, undersides of the leaves, and inflorescences. In mild seasons, some individuals may continue flowering into December.