"owl\'s-clover." YourDictionary, n.d. Web. 11 October 2018. <http://www.yourdictionary.com/owl-s-clover>.
owl\'s-clover. (n.d.). Retrieved October 11th, 2018, from http://www.yourdictionary.com/owl-s-clover
Any of several North American hemiparasitic plants of the genera Castilleja and Orthocarpus of the figwort family, having spikes of variously colored tubular flowers enclosed in prominent, often pigmented bracts.
Origin of owl's clover
From the resemblance of the flowers of some species to owls' faces