 | 888-23. Flower of puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010Similar picturesSmall thumbnails | Use large thumbnails | View as slideshow |
| 888-23. Flower of puncturevine (Caltrop, Tribulus terrestris) in Washington-on-the-Brazos State Historic Site. Washington, Texas, August 29, 2010Similar picturesSmall thumbnails | Use large thumbnails | View as slideshow |
                                                                                                                                                                                                                                                         |