Devil's paintbrush is also called orange hawkweed.
devil's paintbrush definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a perennial European hawkweed (Hieracium aurantiacum) with leafless flower stalks bearing a cluster of orange-red heads: now a common weed in N U.S. and Canada
devil's paintbrush definition by American Heritage Dictionary
See orange hawkweed.