The book presents the 50 most important medicinal plants in Finnish nature, explaining how they affect and guiding their safe use. The selected plants are based on a long tradition and research results obtained from recent years. The plants presented are effective but safe. The book explains why each plant is effective in ailment and how the plant is used medicinally in for example exhaustion, insomnia, intestinal problems, high blood pressure, or various aches and pains. Finnish language.