David Rogers has over the decades collected in this two volume flora the hundreds of plants found in the region of Tassajara Hot Springs.

Each plant in the region is covered with its Latin name, common name, and a documented list of species, noting their occurrence as well as their distribution throughout the region. A glossary of terms and full index are also included.

To name just a few: Hummingbird Sage, Bigberry Manzanita, Monkeyflower, Yerba Santa, Chaparral Yucca, Ceanothus, Penstemon, Maiden-hair Fern, Pacific Madrone, Poison Oak, Woolly Blue Curls, Lupine, Deer Brush, and Santa Lucia Fir (pictured).