is the only orange paintbrush found on the plains. C. integra also grows
on the lower foothills. The orange parts of the plants are leafy bracts, not the
flowers. The common name "wholeleaf" refers to the lack of lobes on
the leaves and bracts.
Compare to Castilleja linariifolia, which is sometimes found in the
foothills but does not extend onto the plains. Castilleja
linariifolia has narrow, lobed leaves and the plants usually have a taller,
more slender growth habit.