Castilleja linariifolia is a perennial plant, native to the United States and is the state flower of Wyoming. It has a number of common names including Wyoming Indian paintbrush, Narrow-leaved Indian paintbrush, desert paintbrush, Wyoming desert paintbrush, Wyoming paintbrush, linaria-leaved Indian Paintbrush, and Indian paint brush. It grows up to 1 meter in height and has linear leaves which are between 20 and 80 millimeter in length and have up to 3 lobes. The flowers, which consist of a red to yellow calyx and yellow-green floral tube, appear in panicles or spikes between June and September in its native range.