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owl's clover

noun
  1. any of several western American plants belonging to the genus Orthocarpus, of the figwort family, having dense spikes of flowers in a variety of colors with conspicuous bracts.
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Origin of owl's clover

An Americanism dating back to 1895–1900
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018