The cudweeds are comprised of many different species that are similar in growth habits and control measures. In general, the cudweeds have basal rosettes and the leaves and seedheads are covered in distinct fine, white "wooly" fibers. Some cudweeds only have this hair on the undersides of the leaves, and other cudweeds have this hair on all surfaces. Cudweeds overwinter as small basal rosettes, but in the spring usually grow an upright stem., The two species common in turf and lawns in Australia are G. coarctatum and G. americanum. They are annual or short lived perennials with grey-green, serrated-edged leaves.