Nemacaulis is a monotypic plant genus in the buckwheat family containing the single species Nemacaulis denudata, which is known by the common names woollyheads and cottonheads. This plant is a somewhat undistinguished delicate annual herb with thin, spindly, naked stems and woolly white flowerheads. It can be found in sandy habitats in California, Arizona, and northern Mexico.
External links Jepson Manual Treatment USDA Plants Profile Flora of North America