Platanthera x estesii

Platanthera x estesii, Estes Rein Orchis, is a natural hybrid of the white Platanthera dilatata and the green Platanthera stricta. We found this growing with one of the parents near White Dome Geyser in Yellowstone National Park. The spur (not visible), the color of the flowers and the lip all led to this identification, though the green-flowered Platantheras are notoriously difficult to tell apart.