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Ratibida Columnaris

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Mexican hat flowers (Ratibida columnaris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 16, 2010
Flower head of Mexican hat (Ratibida columnaris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2010
Mexican hat flowers (Ratibida columnaris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 9, 2010
Cylindrical flowerhead of Mexican hat (Ratibida columnaris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, May 31, 2008
Mexican hat (Ratibida columnaris) cylindrical flowerhead with dark red-purple disk flowers and yellow and brown ray flowers on Loop Trail in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 9, 2008

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