Acorus

Has an iris-like growth habit,with unusual but inconspicuous flowers in summer. The strongly aromatic leaves were, in former times, strewn on the floor of cottages to serve as an air freshener. Roots are said to produce an exudate which prevents mosquite larvae from developing. It may be possible to control mosquito larvae in small bodies of water by planting sweet flag around the edges. We do not have information on the quantity of plants required to achieve control, although after a sweet flag plant was placed in a mosquito larvae-infested tub of water, the larvae disappeared and did not return. For moist to wet soil or shallow water.

Like the species, above, but with leaves attractively striped with white.