Katniss's mother is a woman who acts as a healer for those around her. Although she entered into a massive depression after the death of her husband, Katniss's father, her skill with herbs is something that Katniss wishes she had inherited when she enteres the Hunger Games, as it is something that helps other competitors, such as Rue, to survive the challenges that they face there. For example, Rue knows how to use the plants and leaves around them to create a paste that gives Katniss relief from the stings of the tracker jackers.
The skill of Katniss's mother also becomes immensely significant in the later two books, when it becomes clear that Prim has inherited her mother's skill in healing and wants to learn to become a doctor and follow in her mother's footsteps. This is something that will of course have a tragic conclusion.
Katniss's mother is a healer for those around her and her skill is extremely useful in the last 2 books of the series where she is able to use her skills to help many patients.
kind of a nurse!