Monogramma may refer to:
*
''Monogramma'' (alga), a genus of algae in the class
Bacillariophyceae
Bacillariophyceae is a group of pennate diatoms with a raphe (raphids). According to Ruggiero et al., 2015, the diatoms are treated as follows. This treatment largely reflects that used by Algaebase as at 2015, and is also reflected in the current ...
, order unknown
*
''Monogramma'' (plant), a genus of plants in the family Pteridaceae
{{Genus disambiguation