Calycadenia is a genus of flowering plants in the aster family, Asteraceae, known commonly as the western rosinweeds. They are native to California, especially around the Central Valley. The ranges of two species (C. fremontii + C. truncata) do extend north into Oregon.
These are annual herbs variable in size from just a few centimeters tall to well over one meter. They are aromatic. The leaves are alternately arranged except in C. oppositifolia, in which they are opposite. The leaves are narrow ...