[{SlideShowNav}] !!!Prickly Pear Cactus [{Image src='410ec.jpg' width='675' height='800' alt='Prickly Pear Cactus ' class='image_left'}] [{SET customtitle='Prickly Pear Cactus '}] \\ The Prickly Pear Cactus is the most common of all cacti on the Galapagos Islands; it will grow trunks as high as 1.5 m (5 ft) tall on islands where herbivores are a threat.