All Species in Ophioglossum
- Bulbous Adderstongue (Ophioglossum crotalophoroides)
- California Adderstongue (Ophioglossum californicum)
- Hand Fern (Ophioglossum palmatum)
- Large Adderstongue (Ophioglossum polyphyllum)
- Limestone Adderstongue (Ophioglossum engelmannii)
- Longstem Adderstongue (Ophioglossum petiolatum)
- Netted Adderstongue (Ophioglossum reticulatum)
- Old World Adderstongue (Ophioglossum pendulum)
- Southern Adderstongue (Ophioglossum vulgatum)
- Tropical Adderstongue (Ophioglossum polyphyllum var. polyphyllum)