Xylorhiza

Xylorhiza is a genus of flowering plants in the family Asteraceae, commonly known as woody asters. These plants are native to western North America, particularly in arid and semi-arid regions. They are characterized by their woody stems, which distinguish them from many other herbaceous asters. The leaves are typically narrow and somewhat leathery, and the flowers are daisy-like with ray florets that are usually white or pale blue and disk florets that are yellow.

Species within the Xylorhiza genus are often found in disturbed habitats such as roadsides, gravelly areas, and open, dry plains. They are well-adapted to harsh conditions, including drought and poor soil. The woody habit of Xylorhiza allows them to survive and regrow after periods of stress. Reproduction is primarily through seeds, and their pollination is facilitated by insects.

While not widely cultivated, Xylorhiza species are of interest to botanists and ecologists studying plant adaptations to xeric environments. Some species may have minor uses in traditional medicine by indigenous peoples, but this is not a widespread application. The genus is relatively small, with a limited number of recognized species, and ongoing taxonomic research may refine its classification.