Genus Delairea refers to a group of invasive weed plants, which are commonly known as Cape ivy or German ivy. These plants originated from South Africa and were introduced in other parts of the world as ornamental plants. The plant's species are known to grow and spread rapidly, choking and killing other plants in their path. Some of the synonyms used for Genus Delairea include Senecio mikanioides, Delairea odorata, and Kleinia fulgens. Although they are invasive species, they have been used in herbal medicine to treat various ailments, including respiratory conditions and skin diseases. However, care should be taken to prevent their spread in non-native habitats where they can cause damage to the ecosystem.