Seeds from this Castilleja sessiliflora has long, white flowers with a 3 lobed lower lip. Bracts below the flowers are green to pink. Downy Paintedcup is one of two Paintbrush species growing on the plains, the other being the bright orange Castilleja integra. Castilleja Sessiliflora, or more commonly know as Downy Paintedcup, is a subshrub forb herb with yellow green foliage and yellow flowers of the genus Castilleja. It has a moderate growth rate and a height of 1. 3 feet at maturity. Its duration is perennial which means it will grow year after year. Its active growth period is spring and summer, blooms during mid spring and is intolerant of shade. Castilleja Sessiliflora or Downy Paintedcups floral region is North America US Lower 48, specifically in the states of Arizona, Colorado, Iowa, Illinois, Minnesota, Missouri, Montana, North Dakota, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, Wisconsin and Wyoming. Zones 3 to 10.