owl's clover
(also owl clover) US
noun
Any of several New World species of the genus Orthocarpus and occasionally also the closely allied genera Castilleja and Triphysaria (family Scrophulariaceae), which bear spikes of flowers that are typically colourful and enclosed in pigmented, multi-lobed bracts, and whose corollas, or the markings on these, are thought to be reminiscent of owl faces.
Origin
Late 19th century.