Centrostegia is a monotypic genus of plants in the family Polygonaceae with a single species in the southwestern United States and northwestern Mexico. Centrostegia thurberi is known by the common names Thurber's spineflower and red triangles. It is a petite herb with a distinct red coloration. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Plant