| Species | Common Name |
|---|---|
| Corallorhiza maculata var. maculata | spotted coralroot |
| Epipactis gigantea | stream orchid |
| Epipactis helleborine | |
| Piperia elegans subsp. elegans | coast piperia |
| Piperia elongata | wood rein-orchid |
| Piperia michaelii | Michael's rein-orchid |
| Piperia transversa | flat-spurred piperia |
| Piperia unalascensis | |
| Spiranthes romanzoffiana |