1.   Cipollini and Levey studied two common weed species in the nightshade family, horse nettle and black nightshade.

2.   Ground ivy, a common weed in the East, is known as gill-over-the-ground.

3.   Moss growth on tiles can be eliminated with common weed killer.

4.   Mullein is available at health food stores as well as being a common roadside weed in most of temperate North America.

5.   Recent research at the University of Iowa has shown that this natural byproduct is very effective on common weeds like crabgrass, plantain and dandelion.

6.   The larvae of darkling beetles, for example, feed on common weeds during the spring.

7.   The widdy widdy bush is a common weed in Antigua that was part of the diet of slaves.

8.   U.S. officials insist that glyphosate, sold in the U.S. as a common weed killer under the name Roundup, is safe.