Ophioglossum

Ophioglossum vulgatum

Adder's-tongue

Ophioglossum lusitanicum

Least adder's-tongue

Ophioglossum azoricum

Ophioglossum reticulatum

Netted adderstongue

Ophioglossum petiolatum

Longstem adderstongue

Ophioglossum engelmannii

Limestone adder's-tongue

Ophioglossum pusillum

Northern adderstongue

Ophioglossum crotalophoroides

Bulbous adderstongue

Ophioglossum nudicaule

Least adderstongue

Ophioglossum pendulum

Old world adderstongue

Ophioglossum costatum

Ophioglossum polyphyllum

Ophioglossum thermale

Ophioglossum coriaceum

Ophioglossum californicum

California adderstongue

Ophioglossum gomezianum

Ophioglossum parvifolium

Ophioglossum lancifolium

Ophioglossum thomasii

Ophioglossum lusoafricanum