Calamophyton
noun
Cal·a·moph·y·ton
| \ ˌkaləˈmäfəˌtän\
Definition of Calamophyton
: a genus (the type of the family Calamophytaceae) of sphenopsid plants from the Middle Devonian of Germany that have bifurcated leaves and naked pendulous sporangia and are the earliest indubitable sphenopsids
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