Left: A closeup of the flower of the Phantom Orchid,
Cephalanthera austinae. Right:
Flowers of the Western Coral Root, Corallorhiza mertensiana.
Left: A magnified view of the coralloid underground rhizome of
Corallorhiza striata. The black color comes from the color of
the hyphae of the endophytic fungus; the white tips are not yet
infected. Right: A view of the rhizome of the sibling species
Corallorhiza maculata, unearthered in its natural setting.
The fungi which associate with this orchid are lightly colored,
thus the entire rhizome is whitish.