small cactus with white blooms, joshua tree national park, california

plant flower tree cactus thorns nature grass soil branch leaf wildflower winter twig shrub small white blooms joshua national brush close-up california usa desert ecosystems colorado mojave arid climate distinctive rock formations twisted famous travel destination cholla cacti prickly rugged hiking hike trail natural beauty environment conservation extreme terrain remote isolation recreation leisure parks outdoors scrub park tree u2 adventure