HARE'S EAR MUSTARD, Conringia orientalis (L.) Dumort. 1, open seed pod; 2, seed; 3, entire plant. Annual or winter annual, with taproots, reproducing by seed. Stem erect, growing from 1 to 3 feet (30 to 90 cm) tall, branching little if at all, becoming stiff and wiry with age. Leaves smooth, alternate, elliptic in shape, 1 to 3 inches (2.5 to 7.5 cm) long, base clasping the stem with heart-shaped lobes. Flowers small, pale yellow, 4-petaled. Pods erect, narrow, 2 to 4 inches (5 to 10 cm) long. Seeds dark mahogany, oblong, circular in cross section, surface roughened with minute shallow pits. Found in small-grain and legume fields.