SLEEPY CATCHFLY, Silene
antirrhina L. 1, plant; 2, flower with pod; 3,
upper portion of stem; 4, flower enclosed by calyx; 5, seed.
Annual, reproduced by seeds only. Stem slender, erect, 1
to 2-1/2 feet (30 to 75 cm) high, sparingly branched, upper part often
of darker color and sticky. Leaves opposite, not petioled, linear,
although those at base are somewhat broader. Flowers small, 1/8
inch (3 mm) across, pink with 5 petals, enclosed at base by ovoid calyx.
Seeds kidney-shaped, very small, lead-colored, covered with knobs.
Found especially on dry, light soil. Important weed in clover seed
fields, because seeds are difficult to remove from the clover seed.