IPM1007, Revised November 2009
Winter annual broadleaf
A common winter annual found throughout the United States. Seedlings have cotyledons that occur on petioles, are hairless, 12 to 15 mm long, and oval. Rosette leaves and lower stem leaves are rounded but taper to the base. Margins may be lobed, toothed or entire. Upper stem leaves do not have petioles and are clasping at the base. All leaves are covered with short hairs. Individual flowers are 2 mm long, have four white or greenish white petals, and occur on stalks 4 to 8 mm long. Many fruits make up the distinctive “pepperweed” seedhead, which is ovate, 5 to 6 mm long and 4 mm wide, with a winged structure at the apex.
IPM1007, revised November 2009
Order publications online at http://extension.missouri.edu/explore/shop/ or call toll-free 800-292-0969.