A familiar and thoroughly naturalized Eurasian species, often forming large beds along roadsides and railroad embankments, as well as occurring in fields and clearings, on dunes and shores, and in similarly open places. Long cultivated and collected as early as 1867 in Washtenaw Co.

The corolla is usually pale pink to whitish, and often "double," occasionally deeper pink in escaped cfultivars. The calyx is usually flushed with reddish toward the apex.