Steamboat Geyser Steamboat Geyser Platanthera x estesii Porcelain Basin Canary Spring Bison Canary Spring The Terraces Dendrobium christyanum Paphiopedilum sukhakulii Dendrobium agathodaemonis Dendrobium cuthbertsonii Restrepia flosculata Masdevallia caudata Epidendrum escobarianum Dendrobium hellwigianum Mystacidium capense Promenaea xanthina Dendrobium laevifolium Dendrobium Mountain Magic Ophidion cunabulum Pleurothallis pterophora Masdevallia filaria Lower Falls of the Yellowstone Cluster Thistle Porcelain Basin Hot Water Seepage Early Morning in Porcelain Basin Bull Elk Sapphire Pool Firehole Falls Hot Spring The Terraces at Mammoth Hooded Ladies'-tresses Porcelain Basin Thermophilic Algae and Bacteria The Terraces at Mammoth Mammoth Hot Springs Fringed Gentians Steam Vents The Bull Gibbon Falls The Terraces at Mammoth Hot Springs Tall White Northern Bog Orchis Damselfly