Chrysothamnus vaseyi called Vasey’s rabbitbrush , is a North American species of flowering plants in the aster tribe within the sunflower family. It has been found in Utah, Colorado, northern New Mexico, southern Wyoming, northern Arizona (Navajo County) and eastern Nevada (White Pine County).Chrysothamnus vaseyi is a branching shrub up to 30 cm (12 inches) tall with tan or gray bark, becoming flaky as it gets old. It has many small, yellow flower heads clumped into dense arrays.