| Scientific Name | Authority | Status |
|---|---|---|
| Orthoceras rubrum | Colenso | synonym |
| Orthoceras caput-serpentis | Colenso | synonym |
| Orthoceras strictum f. viride | Hatch | synonym |
| Diuris novae-zeelandiae | A.Rich. | synonym |
| Orthoceras solandri | Lindl. | synonym |
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