Arches Flower Guide. Wondering what flowers you might have seen during your visit to Arches? Look no further! Using the online Arches Flower Guide, you can explore the area's flowers by bloom month, color, name and more by clicking links in one of the sections below. Please help us protect the flowers by staying on trails, rocks, or in washes. Biological soil crust is a living ground cover that is critical for plant life in the park. Stepping on sand anywhere off a trail destroys this crust. Collection of plants is prohibited.