Foto n. 26653 - bluebonnets (Centaurea cyanus)
Jan Kops et al. - Flora Batava - Permission granted to use under GFDL by Kurt Stueber. Source: www.biolib.de - Permission is granted to copy, distribute and/or modify this image under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".
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Foto n. 5222 - bluebonnets (Centaurea cyanus)
Photo by Leo Michels. Usage: Public Domain
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Foto n. 58580 - bluebonnets (Centaurea cyanus)
Jacob Sturm, Johann Georg Sturm - Deutschlands Flora in Abbildungen (1796). - This image is in the public domain because its copyright has expired.
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Foto n. 85011 - bluebonnets (Centaurea cyanus)
Picture modified from Bley, Franz - Botanisches Bilderbuch (1897/98) - Permission granted to use under GFDL by Kurt Stueber. Source: www.biolib.de - Permission is granted to copy, distribute and/or modify this image under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
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Foto n. 135251 - bluebonnets (Centaurea cyanus)
C. Hoffmann - Botanischer Bilder-Atlas (1884) - This image is in the public domain because its copyright has expired.
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Foto n. 68325 - bluebonnets (Centaurea cyanus)
Steve Hurst - USDA-NRCS PLANTS Database - Not copyrighted image
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Foto n. 5221 - bluebonnets (Centaurea cyanus)
Photo by Leo Michels. Usage: Public Domain
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Foto n. 5215 - bluebonnets (Centaurea cyanus)
Photo by Leo Michels. Usage: Public Domain
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Foto n. 61952 - bluebonnets (Centaurea cyanus)
Hippolyte Coste - Flore descriptive et illustrée de la France, de la Corse et des contrées limitrophes, 1901-1906 - This image is in public domain because its copyright has expired.
File size: 39956 bytes - Views: 1280

Foto n. 114396 - bluebonnets (Centaurea cyanus)
Purple flower plant at Kula, Maui - Credit: Forest and Kim Starr - Plants of Hawaii - Image licensed under a Creative Commons Attribution 3.0 License, permitting sharing and adaptation with attribution.
File size: 25376 bytes - Views: 1250