The Western National Parks Association has published some pretty wonderful books since it was founded in 1938. (Back then they were called the Southwest Monuments Association.) They now operate bookstores at 66 NPS sites throughout the western United States with a flagship/headquarters in Tucson. I’ve found and bought a bunch of these while traveling these last few years - Flowers of the Southwest Mesas, Flowers of the Southwest Deserts, 70 Common Cacti, 100 Roadside Flowers – and they’re pretty darn easy on the eyes. You can see more old covers at the NPS’ website here and you can order books, patches and a whole lotta Prickly Pear Cactus Candy directly from the WNPA here.