University of Missouri Extension

IPM1007, Revised November 2009

Practical Weed Science for the Field Scout: Corn and Soybean

Sida, prickly (Sida spinosa)

Summer annual broadleaf

Prickly sida
Prickly sida

A summer annual with yellow flowers and distinctly toothed leaves. Seedlings have two cotyledons that are generally heart shaped with a small indentation at the cotyledon apexes. The cotyledons and the stems below the cotyledons (hypocotyls) are covered with short hairs. Mature plants have leaves that are arranged alternately along the stem, approximately 3/4 to 2 inches long, and inconspicuously hairy. Leaves are oval to lanceolate in outline with toothed margins. Leaves occur on petioles that are 1/2 to 1-1/4 inches long and have small spines (stipules) at the base of each leaf petiole.

Prickly sida
 

IPM1007, revised November 2009

Wild thing
 

IPM1007 Practical Weed Science for the Field Scout: Corn and Soybean | University of Missouri Extension

Order publications online at http://extension.missouri.edu/explore/shop/ or call toll-free 800-292-0969.

University of Missouri Extension - print indicia