Lance-leaved coreopsis flowers (Coreopsis lanceolata 'Rotkelchen'). This plant is also known as 'Ruby Throat'.

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Photo credit: © BRIAN GADSBY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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Keywords: biological, biology, botanical, botany, coreopsis, flora, flower, flowering, flowers, garden, horticultural, horticulture, lance-leaved, lanceleaf, lanceolata, multiple, nature, perennial, plant, plants, robin, rotkelchen, ruby, throat, tickseed, yellow