Rabbitbrush
Chrysothamnus Nutt. includes herbaceous perennials and shrubs native to western North America. Anderson (1984) presented an overview of the genus in the broad sense. Urbatsch, Roberts & Neubig (2006; Flora North America) presented a much reduced treatment of the genus with only 9 species recognized. Species formerly in the genus have been assigned to Cuniculotinus, Ericameria, and Lorandersonia including Rubber Rabbitbrush (Ericameria nauseous); it is the most widely distributed of the rabbitbrush and includes 22 subspecies.
Heads lack ray florets. Phyllaries are in vertical ranks or spirals.
