Brickellia longifolia, the longleaf brickellbush, is a shrub in the family Asteraceae. It is found in the Colorado Plateau and Canyonlands region of the southwestern United States, in Arizona, Utah, Nevada, and western Colorado.
Some authors consider the closely related Mojave Desert plants as a variety of B. longifolia but others recognize it as a distinct species, B. multiflora.
Brickellia longifolia is a densely branched shrub from tall.
Narrow, stalkless leaves are long and taper to a point.
Brickellia longifolia blooms from June to September. Small green flowers are in clusters of 3-5 per head, with only disk flowers, and many clusters on a stalk that is elongated from the top of each branch.
It can be found in moist areas near seeps and riparian areas in Southern Utah, with occurrences from California to Arizona.