1) Fern genus 2) Genus ophioglossum 
Ophioglossum austroasiaticum Ophioglossum azoricum Ophioglossum californicum Ophioglossum costatum Ophioglossum crotalophoroides Ophioglossum engelmannii Ophioglossum lusitanicum Ophioglossum nudicaule Ophioglossum pedunculosum Ophioglossum petiolatum Ophioglossum polyphyllum Ophioglossum pusillum Ophioglossum pycnosticum Ophioglossum reticulatum ...
Ophioglossum is a genus of ferns with sessile sporangia arranged in two rows as to form a spike.
[n] - the type genus of the fern family Ophioglossaceae
ophioglossum Known as adder's tongue, or snake tongue, it is a genus of about 25-30 species of Ophioglossales in the family Ophioglossaceae, with a cosmopolitan but primarily tropical and subtropical distribution. Adder's tongues are so-called because the spore-bearing stalk is thought to resemble a snake's tongue.
genus Ophioglossum noun the type genus of the fern family Ophioglossaceae