Three owl's clovers from western North America - Triphysaria eriantha ssp. rosea, Triphysaria eriantha, and Triphysaria versicolor ssp. versicolor. These lovely plants are hemiparasites belonging to the family Orobanchaceae. This group is thought to be closely related to the genera Castilleja and Orthocarpus.
Photo Credits: Tom Hilton (http://bit.ly/1Ikg9Vy) and Ken-ichi Ueda (http://bit.ly/1CRPxaT)