Question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Castilleja exserta -  Castilleja exserta (formerly Orthocarpus purpurascens) is a species of plant in the genus which includes the Indian paintbrushes. Its common names include purple owl's clover escobita and exserted Indian paintbrush. This species is native to the Southwestern United States in various habitats of California Arizona and New Mexico; and to Northwestern Mexico. It is an introduced species in Hawaii.
Answer:
Plant