Often coarsely toothed when young, later entire. Often has a strange odor.
Whiteflies can kill a small plant very quickly.
They make large container plants in the summer on patios, or set among and within gardens. These may need to be pruned back in the fall before being brought inside due to size. All parts of this plant are narcotic and poisonous, and are used by native peoples in South America for medicinal and narcotic uses. Water well in the summer, but avoid waterlogging the roots. Water sparingly in the winter, but avoid letting the plant dry out completely.