[Wikipedia] Description, Ecology, Invasive Species: The blooms have a strong and somewhat rank scent. They are pollinated by both bees and butterflies and the plant is noted for attracting insects. It is used as a food plant by the larvae of some Lepidoptera species including angle shades. Seeds have tufts similar to dandelions that allow wind dispersal, and as such can self-seed freely and become invasive if not properly controlled. Invasive species It is listed as a NEMBA 1b invasive in the Western Cape, South Africa. It may not be owned, imported, grown, moved, sold, given as a gift or dumped in a waterway.[5][4][6] It requires compulsory control as part of an invasive species control programme to remove and destroy. The plants are deemed to have such a high invasive potential that infestations can qualify to be placed under a government sponsored invasive species management programme. No permits will be issued.[7] (link added by Mary Ann Machi)