|Castilleja linariifolia, in the Grand Teton National Park, Wyoming.|
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 paintbrush. 
It grows up to one meter in height and has sparse, linear leaves which are between 20 and 80 mm in length and have up to 3 lobes.  The flowers, which consist of a pinkish-red to yellow calyx and yellow-green floral tube, appear in panicles or spikes between June and September in its native range. 
This species occurs on rocky slopes and arid plains and is associated with sagebrush scrub as well as pinyon pine or juniper woodland.  It is native to Arizona, California, Colorado, Idaho, Montana, New Mexico, Nevada, Oregon, Utah and Wyoming. 
When options were being considered for a state flower for Wyoming, Dr. Grace Raymond Hebard from the University of Wyoming promoted this species over rival candidates including the columbine and fringed gentian. 
- "Wyoming State Flower Indian Paintbrush Castilleja linariaefolia". Netstate. Retrieved 2008-04-08.
- "UC/JEPS: Jepson Manual treatment for Castilleja linariifolia". The University and Jepson Herbaria, University of California, Berkeley. Retrieved 2008-04-08.
- "PLANTS Profile for Castilleja linariifolia (Wyoming Indian paintbrush)". USDA. Retrieved 2008-04-08.
- "Wyoming Statute 8-3-104". Wyoming Statutes. Retrieved 2008-04-08.
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