Horseweed/Marestail

Taken from: https://www.bookstore.ksre.ksu.edu/pubs/MF3014.pdf

Marestail, a native to the United States, is considered either a winter or summer annual that is often difficult to identify. Marestail is a dicotyledon plant that has small, round cotyledons following emergence. The first leaves of marestail have a broad, round end and have a whorled leaf arrangement that forms a rosette. Small plants may be green or purple during cool weather. The first leaves generally have a smooth leaf margin, while later leaves often have an irregular-toothed margin. Roots of marestail are fibrous.