About Baccharis vanessae R.M.Beauch.
Baccharis vanessae is a sticky, glandular shrub that grows dense, branching, erect stems reaching a maximum height close to 2 meters. Its leaves are linear, and can grow up to 4.5 centimetres (1.8 in) long. This is a dioecious shrub, meaning female and male flower heads grow on separate individual plants. It produces fruit in the form of an achene with a pappus that can grow up to one centimetre long. Elongated lepidopteran galls are often found on this species, and Oscar Clarke of Riverside suggests the presence of these galls indicates a very old evolutionary relationship between the shrub and the gall-forming organism.
