Goodyera oblongifolia "Giant rattlesnake plantain"
This orchid has a rosette of shiny evergreen leaves with a light stripe down the rib of the leaves. It sometimes seems to carpet the floor of the forest under evergreens. In the Yellowstone area, I seem to find them under relatively dense Douglas fir. They spread with laterals off the rhizome. According to Case (1987) Goodyera species also hybridize with each other.
Locations: Canyon area: Large colony along the south rim trail not far from Artist's Point, behind trees in the shade. UTM GPS: 12T 0541339 4952045. Mammoth: South of the Upper Terrace Road, can be reached from the Parking lot. On the Solfatara Trail that begins south of Obsidian Cliff and north of Grizzly Lake Trail.
Blooming: mid-to-late August into September.
Sniff test: no detectable fragrance